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High Cascades Hiking Oregon Three Sisters Area Trip report

Obsidian Loop – 07/15/2025

Following a great visit to Jefferson Park on Monday (post) I continued my solo vacation by revisiting a hike that we refer to as “The hike that shall not be named.” On October 14th, 2012, we (including our Son) had set off from the Obsidian Trail for what I thought was going to be 15-mile loop with epic views. A combination of me misunderstanding the route described in the guidebook and cloudy conditions it wound up being a largely viewless 18.6-mile trudge (post). Heather and I revisited a portion of that hike by visiting Four-in-One Cone in 2019 (post), but we had not been back to the Obsidian Trail.

I had my Central Cascades Wilderness Permit for the Obsidian Trailhead and set off ridiculously early (3am) to make the 2:30 hour drive.
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The trailhead at 5:30am.

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In addition to the Central Cascades Wilderness Permit a NW Forest Pass is required to park at the trailhead.

I set off on the trail which began in the trees before briefly passing through the 2017 Separation Fire scar.
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A connector trail joins from the left shortly after leaving the hiker trailhead. This trail connects to the equestrian trailhead, and it theoretically connects to the Scott Trail. We had used this connecter for the hike that shall not be named, and I was planning on using it again today but more on that later.

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Most of the beargrass was past but there were a few still in bloom.

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Entering the Three Sisters Wilderness.

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The initial section of the trail climbs gradually.

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Entering the fire scar.

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Sims Butte

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The Middle Sister on the left and South Sister (post) to the right.

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There had been some recent trail work done on the Obsidian Trail.

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Just under 3.5-miles from the trailhead I arrived at a lava flow which the Obsidian Trail climbs over providing the loop’s first set of great views.
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Partridgefoot

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North and Middle Sister

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Scott Mountain (post) on the left.

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Belknap Crater (post), Mt. Washington, and Mt. Jefferson

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Belknap Crater, Mt. Washington, Mt. Jefferson, and Little Belknap Crater

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Buckwheat

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North and Middle Sister as the trail began to descend to the White Branch.

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White Branch crossing. I was able to rock hop and keep my feet dry.

On the far side of the White Branch is a junction with the Glacier Way Trail.
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Lupine and a patch of snow on the far side of the White Branch.

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Both of the trails lead to the Pacific Crest Trail 1.4-miles apart The Glacier Way meets the PCT near Sunshine, a large meadow, in 0.7-miles and the Obsidian Trail meets the PCT near Obsidian Falls in 1.7-miles. This allows for a nearly 12-mile lollipop loop. It is also where the hike that shall not be named went awry. Sullivan described a 15-mile loop using the PCT and Scott Trails, but I failed to pick up on needing to use the Glacier Way Trail in order to keep the milage to fifteen. Just as we’d done in 2012, I stuck to the Obsidian Trail only this time I knew what I was signing up for. The only thing I wasn’t sure of was how much snow might still be lingering in the area. I was carrying micro spikes and prepared to either turn back or bail on the Glacier Way Trail if need be.

Beyond the junction the Obsidian Trail climbed more steeply before reaching a series of meadows along the South Fork White Branch.
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There was a lot of lupine in bloom along the trail.

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There were quite a few patches of snow starting at 5800′ but most were easy to cross without needing the spikes.

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More trail work.

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I did put the spikes on to cross this patch since it was on a fairly steep hillside.

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When the trail leveled out near the meadows start looking for obsidian in and along the trail.

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Middle Sister from one of the meadows.

Obsidian Trail
The same meadow in 2012.

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Alpine false dandelion

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Sub-alpine mariposa lily

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Alpine wild buckwheat

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Cobwebby paintbrush

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South Fork White Branch

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More patchy snow.

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Second crossing of the South Fork White Branch in the meadows.

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Western pasque flowers going to seed.

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Western pasque flower still in bloom.

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Heading back to the trees near Obsidian Creek.

The trail descended to a crossing of Obsidian Creek below Obsidian Falls then climbed to a junction with the Pacific Crest Trail.
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Obsidian Creek

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The top of The Husband sticking up above the trees.

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Jacob’s ladder

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Junction with the PCT.

I turned left onto the PCT which switchbacked up above Obsidian Falls. I made the short detour down to the viewpoint below the waterfall.
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Spur to the base of the falls on the left.

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Obsidian Falls

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Obsidian Falls from the PCT.

Above the waterfall the PCT levels out on a wide plateau with a view of the Middle Sister.
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Looking back down Obsidian Creek.

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The headwaters of Obsidian Creek.

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Spring feeding the creek.

There were two large snowfields still covering the PCT along this section but given the terrain was flat and there were well established footprints they were fairly easy to cross.
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The first snowfield passed one of several ponds on the plateau, this one being frozen.

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Frozen Pond.

One of the Arrowhead Lakes
The same pond in October 2012.

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The second snowfield crossing.

Pacific Crest Trail
Roughly the same spot in 2012, note the small pond ahead.

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The small pond today.

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Obsidian

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Little Brother ahead.

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North Sister

At the northern end of the plateau the trail begins a descent into Sunshine, a large meadow along Glacier Creek.
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User trail leading down to Glacier Creek. I did see one person down at the creek gathering water.

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View from the junction with the user trail. If you look closely, you can see the person who was getting water near the trail crossing of the creek below.

There were more patches of snow to navigate as I made my way down to Sunshine on the PCT but nothing had been too bad, so I decided not to bail when I passed the Glacier Way Trail junction and continued down to Glacier Creek.
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Belknap Crater and Mt. Washington were once again visible.

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I ended up going around this one.

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Sign at the junction.

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A closed user trail that has been replaced by the one up above.

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The PCT crossing Glacier Creek.

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Paintbrush

Beyond Glacier Creek the Pacific Crest Trail did some ups and downs before arriving at Sawyer Bar, a crossing of the White Branch at a lava flow.
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Leaving the Obsidian area.

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I’d also left the maintained trail area. This was probably the worst obstacle of the day but there were a number of downed trees along this section of the PCT and later on the Scott Trail.

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Lots of lupine again.

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The PCT made a hard right turn to the east at the lava flow.

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Belknap Crater, Mt. Washington, Three Fingered Jack and Mt. Jefferson

It had been a little hazy to the north all morning, and I had started getting a faint whiff of smoke every once in a while, after crossing Glacier Creek. Looking at the sky as I neared Sawyer Bar it was obvious that smoke from the Cram Fire over 60 miles away just NE of Madras was being blown into the area by the NE winds.
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North Sister and Little Brother

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Dropping down to Sawyer Bar. There was still a snowfield over the White Branch.

My arrival at Sawyer Bar was loudly announced by a resident yellow-bellied marmot.
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After a brief stint in some sparse trees the trail entered the lava flow and headed for a narrow chute where it switched back relentlessly in the loose volcanic rock.
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Collier Cone poking up ahead.

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Paintbrush

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Heading into the chute with the Sun above.

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Penstemon

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Sorrel

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Looking back down from near the top.

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Goldenrod

I wasn’t sure if I was going to be able to climb up onto the rim of Collier Cone as we had in 2012 due to the presence of snow, but after reaching the top of the chute and seeing the use trail into the cone I could tell that it would be possible.
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The high point of Collier Cone from the PCT.

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Catchfly

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North and Middle Sister from inside the cone. I was following use trails toward the low point along the rim to save myself some effort.

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Looking back at the smoke from the Cram Fire flowing through Santiam Pass.

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The opposite side of the cone.

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North and Middle Sister from the rim. The glacial lake at the bottom is from melting snow and the shrinking Collier Glacier.

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Middle Sister and Little Brother

Collier Glacier in the clouds
The view was a little different in 2012.

The wind was whipping pretty strongly but I took advantage of a couple of large cinder rocks to take a seat, have some food, and change my socks before continuing.
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Silvery raillardella
Silvery raillardella

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Dwarf alpinegold

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Heading down to the PCT.

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On last look back from the PCT.

I continued north on the PCT rounding Collier Cone’s ridge and then descending for almost a mile and a half to Scott Meadow.
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I passed a hiker and her dog just before rounding the ridge here, the first I’d seen other than the person getting water from Glacier Creek.

After rounding the ridge I spotted the sketchiest snowfield of the entire hike, but having just seen the hiker and dog coming from that direction helped boost my confidence.
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I put my micro spikes on for the second time today and carefully made my way across the soft melting snowfield. That was the last time the spikes felt necessary, but not the end of the snow patches.
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Collier Cone, North Sister and Little Brother from the far side of another snow patch.

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There was evidence of some glissading down this patch to the PCT below. I was able to avoid most of the snow by looping around it.

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I just had to cross this short section in order to loop around the rest.

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The creek along the trail here is not named on maps and is shown as seasonal.

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The final snow patch along the PCT before Scott Meadow.

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Almost to the meadow.

This would mark my fourth visit to this meadow. The first was of course in October 2012 and the third was in August 2019 on our Four-in-One Cone hike. In between those two hikes was a July 29th visit during our Matthieu Lakes hike (post). The 2013 hike had been the only one where there were any flowers to speak of blooming in the meadow. At that time it was primarily lupine with some scattered paintbrush, and a host of mosquitos. I had been expecting mosquitos all day, but whether it was timing, the breeze, or the DEET I had applied before setting off there had been almost no sign of them all morning and it was the same at the meadow.
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I’m not sure my timing could have been much better for the flowers this year. It took me a bit to cover the 0.2-miles between the start of the meadow and the Scott Trail junction.
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Paintbrush and cinquefoil

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Western pasque flowers

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Alpine speedwell

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Lupine

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Alpine false dandelions, speedwell, cinquefoil and possibly some pussytoes.

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California tortoiseshell

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Bog laurel

The meadow through the years.
Collier Cone
October 14,2012

Pacific Crest Trail in Scott Meadow
July 29, 2013

The Pacific Crest Trail heading toward North Sister, Middle Sister, and Collier Cone from Scott Meadow
August 14, 2019

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Today

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The junction with the Scott Trail.

I turned left onto the Scott Trail and followed it up an open hillside.
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Yapoah Crater to the left.

After making the climb the trail gradually descended to a cinder field near Four-in-One Cone.
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Pussy paws

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Four-in-One Cone

A user trail leads up the cone and despite the lack of views we had made the 0.4-mile detour along the top. That detour had been the last straw for our son who didn’t realize that it wasn’t part of the loop needed to get back to the car. When he got to the top and found out it was just an out-and-back side trail he was not at all happy with me. I didn’t make the side trip this time given the increasing smoke on the horizon and the fact that Heather and I had gotten to enjoy the view in 2019.
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Looking back at the side trail after passing it.

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The view from the trail below Four-in-One Cone isn’t too bad.

Beyond Four-in-One Cone the Scott Trail briefly continues through the cinder field before skirting the tree line next to a lava flow.
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North Sister and an increasingly hazy sky.

The Scott Trail eventually crosses over the lava flow then enters the forest as it descends toward the McKenzie Highway.
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Sign reminding visitors there are no campfires allowed above 5700′.

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There were more snow patches in the forest but nothing much on the trail itself. A bigger issue was the amount of blowdown along the trail; however, I did pass a trail crew working their way up the trail.

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Fritillary on valerian

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Queen’s cup

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Lousewort

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Rosy spirea

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Fading Washington lilies.

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Strawberry blossoms

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Larkspur

I had been watching for the connector trail and keeping my eye on the GPS, but somehow I completely missed it. I did pass a decommissioned trail with a closed for rehabilitation sign. In 2012 there had been a sign at the junction but by 2019 the sign was missing but the trail was obvious.
Scott Trail on the left with the connector to the Obsidian Trail to the right.
The connector trail on the right coming from the opposite direction that I was headed.

The Forest Service page for the Obsidian Trailhead still lists the Obsidian Tie Trail and as providing access to the Scott Trail which leads me to believe I just didn’t notice it, but it’s also possible that it has been decommissioned and the trail that I had passed after just setting off is now just a connector to the Obsidian Equestrian Trailhead.

Missing the connector wasn’t the end of the world as the Scott Trail crosses the McKenzie Highway a little over a quarter mile from the tie trail (or former tie trail).
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It was when I reached this meadow that I knew I’d missed the turn.

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Looking across the meadow.

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Shooting stars

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The highway from the wilderness sign.

I popped out onto the highway and turned left for a 0.6-mile road walk to the Obsidian Trailhead.
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Historical marker for the 1862 Scott Road.

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It was another third of a mile to my car along the gravel road to the trailhead.

I saved myself a little over a mile by not retracing our side trip across Four-in-One Cone, but missing the connector trail added almost a third of a mile so instead of an 18.6-mile loop like 2012 my GPS came in at 17.8-miles. Skipping Four-in-One-Cone also shaved off a little over 100′ of elevation gain leaving today just under 3400′ of cumulative gain.
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Not sure why the Garmin map shows the PCT going along the rim of Collier Cone. It looks as though there is a use trail around the rim, but it certainly is not the PCT.

This was an excellent hike with spectacular views and some nice wildflowers. I was pushing the timing as far as snow goes, but this year has been warm and dry enough that it was passable (with micro spikes) this early. The lack of mosquitos was a huge blessing.

The only bummer was the arrival of the smoke from what has become a very serious fire. As of my writing this on July 16, 2025, the fire is over 64,000 acres with zero containment. Many people have had to evacuate, and many others are on standby to do so. Our prayers go out to them and to the responders doing everything they can to get the blaze under control.

Flickr: Obsidian Loop

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High Cascades Hiking Oregon Three Sisters Area Throwback Thursday Trip report

Throwback Thursday – Obsidian Trail & Four-in-One-Cone

Today’s Throwback Thursday hike was given the name “The hike that shall not be named” by our Son, Dominique. What was supposed to be a 15 mile loop with spectacular mountain views in the Three Sisters Wilderness wound up being an 18.6 mile, mostly view-less loop, through fog and drizzle.

On 10/14/2012 we set off from the large Obsidian Trailhead into the Obsidian Limited Entry Area. The trailhead is located on Forest Road 250 off of Highway 242. A number of wildfires burned through the Three Sisters Wilderness in 2017 most likely affecting some of the forest in this area. As always, check with the Forest Service for current conditions before heading out.

A limited number of permits are available each day for entry into the Obsidian area and we had purchased ours months in advance. Due to having to purchase the permit early we were at the mercy of weather. We arrived before day light which would be delayed a bit due to the damp fog covering the area.
Signboard at the Obsidian Trailhead

Trail sign along the Obsidian Trail

When we had enough light we set off on the Obsidian Trail which quickly entered the Three Sisters Wilderness.
Obsidian Trail entering the Three Sisters Wilderness

Obsidian Trail

Just under 3.5 miles from the trailhead the trail passed through the Jerry lava flow. According to our guidebook there is a view of several Cascade peaks from the flow but all we could see were clouds.
Obsidian Trail

Cloudy day in the Three Sisters Wilderness

Jerry Lava Flow

The trail descended on the far side of the lava to a crossing of the White Branch Creek which was practically dry at the time.
Obsidian Trail approaching the White Branch

White Branch

The trail split just on the other side of the creek which is where our 15 mile hike turned into something longer. I had misunderstood the description of the loop option in the guidebook. The entry in the book was for a 12 lollipop hike for which it had you take the right hand fork 1.7 miles to the Pacific Crest Trail then turn left on that trail for 1.4 miles to another junction in the Sunshine Meadow. Here a left turn would lead .7 miles back to the junction near the White Branch. The loop option that we were trying to follow simply said that from Sunshine continue on the PCT for 2.2 miles to Collier Cone then another 1.8 miles to the Scott Trail, turn left for 4.9 miles, and turn left again on a .6 mile connector trail back to the Obsidian Trailhead. I failed to notice that the entire route was only 15 miles if we took the left fork to the PCT which was .7 vs 3.1 miles (The other additional mileage was due to side trips up the Collier and Four-in-One Cones).
Trail sign near White Branch

We went right. The scenery along the trail was nice but would have been even better without the clouds and with some flowers still in bloom. That being said the South Fork White Branch still had water flowing and there was plenty of obsidian along the trail making it pretty obvious how this trail got its name.
Obsidian Trail

Obsidian on the hillside

Obsidian

South Fork White Branch

South Fork White Branch

We reached the junction with the PCT where signs were posted about the stubborn Pole Creek Fire which was still smoldering in the eastern portion of the wilderness.
Obsidian Trail junction with the Pacific Crest Trail

Dominique spotted a small group of deer near the junction but they scampered off before I could get a clear picture due to the camera lens continually fogging up.
Deer near the Pacific Crest Trail

A short time after turning north onto the PCT we came to Obsidian Falls, a small but scenic cascade.
Obsidian Falls

Obsidian Falls

After visiting the base of the falls we continued north crossing Obsidian Creek and passing its source at Sister Spring.
Obsidian Creek

Sister SpringSister Spring

At this point we were very near to the Middle and North Sisters but there was no way we were going to see anything above us through the clouds.
Talus above Sister Spring

The PCT then passed the small Arrowhead Lakes and more obsidian.
Pacific Crest Trail

One of the Arrowhead Lakes

Obsidian

We continued on the PCT which was now approaching the 7810′ Little Brother which was beyond Sunshine. We could see the meadow and Glacier Creek below but the Little Brother was for the most part hidden from sight.
Sunshine

Snow from the Pacific Crest Trail

On the way down to Sunshine we spotted the Harley H. Prouty Memorial Plaque.
Harley H. Prouty Memorial Plaque

Sunshine

At Glacier Creek we found the junction with the Glacier Way Trail which was the left hand fork we should have taken at the White Branch.
Glacier Creek

Pacific Crest Trail junction with the Glacier Way Trail

Still thinking we were on a 15 mile hike we continued north on the PCT instead of opting for the 12 mile hike and turning down Glacier Way. The trail passed through many small meadows that were probably home to plenty of summer wildflowers based on the amount of lupine leaves we saw. There was no lupine blooming anymore but we did spot a lone western pasque flower gone to seed.
Pacific Crest Trail

Drops of water on lupine leaves

Western pasque flower

A little under 2 miles from Sunshine the PCT arrived at the Jerry Lava flow.
Pacific Crest Trail

Above the lava in the fog we could see the Collier Cone.
Jerry Lava Flow

A .3 mile side trip would lead to a viewpoint along the rim of the cinder cone but first we had to pass through the lava flow to Opie Dildock Pass. Along the way there we spotted some lupine still in bloom, patches of snow, a tree with a rather unique top, and some real life blue sky.
Pacific Crest Trail

Lupine

Snow patch in the Jerry Lava Flow

Sculpted tree top

A little blue sky

We almost thought we’d lost the trail below the pass but the PCT simply scrambled up a gully in the lava.
Pacific Crest Trail heading up to Opie Dildock Pass

Pacific Crest Trail

A small cairn marked the side trail into the fog filled cone.
Heading into Collier Cone

We followed a use path up to the rim.
Inside Collier Cone

But for the fog we would have had an up close view of the Collier Glacier and the North and Middle Sister.
Collier Glacier

We took an extended break on the rim and in that time the fog lifted just a bit. We could at least see back down into the cone and every once in a while we got a glimpse of the northern flank of the North Sister.
Collier Cone

Light coming from the NE side of the North Sister

North Sister

We finally headed down resigning ourselves to the fact that the views weren’t going to get any better on this trip. We returned to the PCT and headed north once again. We did get a little more blue sky overhead and the fog continued to lift allowing us to at least see a little more of our surroundings.
Blue sky for a brief moment

Pacific Crest TrailYapoah Crater in the distance.

We were now heading away from the North Sister toward Scott Meadow and the Scott Meadow Trail. We arrived at the meadow and trail junction 1.8 miles from the side trail into Collier Cone.
Scott Meadow

Pacific Crest Trail in Scott Meadow

The Pole Creek Fire had forced the closure of the PCT at the junction.
Pacific Crest Trail closed due to the Pole Creek Fire at the Scott Trail junction

The meadow looked like it would be an impressive wildflower meadow in summer and provide some good mountain views. On this day the meadow was mostly brown and the mountains nearly hidden although we did get our best glimpse of a mountain looking back at the North Sister from the junction.
North Sister and Collier Cone

North Sister and Collier ConeNorth Sister and the Collier Cone

We vowed to come back to that spot to try again some summer which we did in 2013.
(post)

We turned down the Scott Trail which followed a dry creek bed for a bit before entering a vast pumice plain.
Dry creek along the Scott Trail

Scott Trail

Just over 3/4 of a mile from the Scott Meadow jct we turned right onto a side trail which led up another cinder cone – Four-in-One Cone.
Four-in-One Cone

Climbing Four-in-One Cone

As the name indicates this geologic feature is not a single cinder cone but four connected cones. A path follows the length of the ridge providing plenty of opportunity for views, but not necessarily for us.
Four-in-One Cone

View from Four-in-One Cone

View from Four-in-One Cone

I arrived at the top of the cone first and Dominique soon joined me as I gazed toward the cloud covered Three Sisters. We were about 13 miles into the hike now (we had also done a 13.5 mile hike the previous day) and we were all getting a little tired. The lack of views wasn’t helping raise spirits either. When Dominique reached me he looked around and then asked where the trail went from there. When I informed him it didn’t go anywhere and that it was just another spur trail to a viewpoint he gave me what could only be described as a death stare. His only response was “You mean we didn’t have to climb up here?”. I left him fuming at the southern end of the cone while I headed north along the rim. There I stared into the clouds where Mt. Jefferson, Three Fingered Jack and Mt. Washington should have been.
Four-in-One Cone

We were all dragging a bit as we made our way back to the Scott Trail and headed west. It wasn’t long before we were all suffering from what I’d call “trail madness”. We were moving but only because we had to in order to get back.

A little under a mile from the cone we crossed another lava flow.
Scott Trail

We spent the next 2.7 miles in the forest wondering why a 15 mile hike was seeming so hard and taking so long.
Scott Trail

When we finally arrived at the junction with the .6 mile connector trail to the Obsidian Trailhead Heather gave it a kiss.
Scott Trail junction with the connector trail to the Obsidian Trailhead

We managed to will ourselves through the final stretch and back to our car eager to get back to Bend and find some substantial food. The lack of views had been really disappointing given just how spectacular they should have been, but the real kick in the teeth came after we’d made it back to the east side of the mountains. Beyond the farms near Sisters we had a clear view of all Three Sisters as well as the bank of clouds that had plagued us all day on their western flanks.
The Three Sisters from Sisters, OR

Middle and North Sister

It appeared that we’d been on the wrong side of the mountains all day. Some day we’ll get back to the area which hopefully wasn’t too damaged by last years fires. Until then we have the memories of the “Hike that shall not be named”. Happy Trails!

Flickr: Obsidian Trail & Four-in-One Cone