Obsidian Gear Checklist
The Obsidian Trailhead is a day-use permit trailhead on McKenzie Highway that leads into black volcanic glass, lava flows and the Pacific Crest Trail below the Three Sisters. Hikers write about a printed permit, a long dry stretch between springs, mosquitoes in the meadows in early summer, steep descents on either side of Opie Dilldock Pass, and weather that can switch from damp mornings to pellets and snow in a day. What they pack follows from that: water and a filter, repellent, layers, and a map for the braided lava trails.
What shapes your gear on Obsidian Trailhead
- When permits apply
- The Forest Service requires a Central Cascades Wilderness Permit for day use at 19 of 79 trailheads from June 15 to October 15. Day-use permits cost $1 per person for each outing, and an account is recommended but not required. The agency releases about 40 percent 10 days ahead and the rest 2 days ahead.
- Trailhead and access
- This trailhead reaches the Pacific Crest Trail, the Obsidian Trail and the Scott Trail. Highway OR 242 usually reopens on the third Monday of June if weather allows, and some trails often hold snow into late June. A federal recreation pass is required for parking.
From Recreation.gov
- Loop lengths and climb
- A 2016 news account lists loops of 10.6 and 15.8 miles from the trailhead. A guide describes a 16-mile loop with about 2,800 feet of climbing. A local columnist describes a 13.3-mile Scott Trail and Obsidian loop that tops out at 6,320 feet.
From KVAL, from The Bulletin and AP, NW Hiker and The Nugget Newspaper
- Steep either way
- The columnist says the north side of Opie Dilldock Pass is steep and the south-side switchbacks are steeper, so a clockwise circuit is smarter. A Substack hiker called the descent off the pass grueling and was glad not to be climbing it.
- Weather swings
- On a Labor Day 2008 trip the morning began cool and damp under cloud, and a loop on the PCT later produced small pellets and snow. A multi-day party on the nearby PCT watched a cold front arrive with wind and light rain at camp, then woke to sun that dried their tents.
From Oregon Hikers forum: 8/30-9/1'08 Obsidian Trail-Three Sisters Wilderness and Washington Trails Association
What the agency requires on Obsidian Trailhead
A day-use permit for the date and trailhead
A day-use permit is valid only for entry on the date and at the trailhead printed on it. It is non-transferable, and the trip leader must stay with the group. Carry it and show it when a forest officer asks.
From Recreation.gov and USDA Forest Service, Willamette National Forest
A federal recreation pass for the parking area
A National Forest Recreation Day Pass, a Northwest Forest Pass or any federal interagency recreation pass is required at the site.
From Recreation.gov
Fire limits above 5,700 feet
Campfires are not allowed above 5,700 feet or at some lower destinations, so hot food on the trail means a camp stove.
From Recreation.gov
What hikers carry on Obsidian Trailhead
Water for the dry stretches, plus a way to treat it
Minnie Scott Spring was the first water a 2000 party saw since leaving a lake, and they filled every container there because White Branch Creek was dry. A guide calls the spring apparently year-round. Another hiker who was low on water there drank deeply and refilled a bottle.
From Washington Trails Association, NW Hiker and Ken Barber on Substack
Mosquito protection for the meadows
A June 2015 hiker met mosquitoes from Sunshine Meadow onward on the way down and found that walking fast was the best defense. A guide imagines flying insects thick in the flower meadow near the PCT junction.
From Oregon Hikers forum: Three Sisters: Scott Trail - Obsidian Loop, June 15, 2015 and NW Hiker
Layers for damp starts and sudden hail
A 2016 hiker began a late-summer day on a cool, damp trail. A 2008 hiker had low cloud, then pellets and snow by afternoon. A 2000 party camped in wind and light rain.
From KVAL, from The Bulletin and AP, Oregon Hikers forum: 8/30-9/1'08 Obsidian Trail-Three Sisters Wilderness and Washington Trails Association
A map for the braided lava trails
A June 2015 hiker called the path up Collier Cone well worn but braided, and a guide notes that the loop around the cone meets the PCT in two spots marked by large cairns. The Recreation.gov page also tells hikers to carry a detailed map.
From Oregon Hikers forum: Three Sisters: Scott Trail - Obsidian Loop, June 15, 2015, NW Hiker and Recreation.gov
Paw protection for a dog on the lava
Forum members asked whether a dog's paws cope with lava and obsidian chips. One owner said the area was no worse than parts of the PCT near Mount Jefferson and Mount Hood, but sensitive paws suffered at 11 miles a day. He suggested keeping days to 8 miles or less.
From Oregon Hikers forum: 8/30-9/1'08 Obsidian Trail-Three Sisters Wilderness
12 people can go on one permit. Split this list between them so nobody carries two stoves.
Plan a trip hereWhat hikers regret or leave behind on Obsidian Trailhead
Counting on one small bottle
A hiker with a single 1-liter bottle ran out on a Scott Trail approach, melted snow for dinner and drank charcoal-flavored water the next day because ash fell into the pot.
Planning an overnight on a day-use permit
This permit is for day use. The Forest Service issues separate overnight permits for these wilderness areas, and an older account of camping on the obsidian flow predates the current system.
From Ken Barber on Substack and USDA Forest Service, Willamette National Forest
Skipping the clockwise direction
The local columnist warns that southbound hikers face the steepest switchbacks on the way up, and a Substack hiker was glad not to climb them.
Gear questions for Obsidian Trailhead
Do I need a permit for the Obsidian Trailhead?
Yes, from June 15 to October 15. The Forest Service requires a day-use Central Cascades Wilderness Permit at 19 of 79 trailheads, and this is one of them. A federal recreation pass is also required for parking. The permit is valid only for the date and trailhead printed on it.
From USDA Forest Service, Willamette National Forest and Recreation.gov
Is there water along the Obsidian Trailhead loops?
Not reliably. Minnie Scott Spring is the one source reported by several hikers, and a 2000 party found White Branch Creek dry. A guide says the Sawyer Bar crossing can be difficult depending on the season. Carry extra water and a way to treat it.
From Washington Trails Association, NW Hiker and Oregon Hikers forum: Three Sisters: Scott Trail - Obsidian Loop, June 15, 2015
When does the Obsidian Trailhead open for the season?
OR 242 usually reopens on the third Monday of June if weather allows, and trails can hold snow into late June. The permit season runs June 15 to October 15. A mid-June 2015 hiker expected snow near the spring and found none.
From Recreation.gov, USDA Forest Service, Willamette National Forest and Oregon Hikers forum: Three Sisters: Scott Trail - Obsidian Loop, June 15, 2015
Are there mosquitoes near the Obsidian Trailhead?
Yes, in early summer. A mid-June 2015 hiker found them from the meadow downward, though not as bad as at Mount Jefferson a few days earlier. A forum reader said they would be gone after an early snow.
From Oregon Hikers forum: Three Sisters: Scott Trail - Obsidian Loop, June 15, 2015 and Oregon Hikers forum: 8/30-9/1'08 Obsidian Trail-Three Sisters Wilderness
Which way should I hike the Obsidian Trailhead loop?
A local columnist recommends clockwise on the Scott and Obsidian loop, because the south-side descent from Opie Dilldock Pass is steeper than the north side. A Substack hiker walked the same direction and called the descent grueling.
Sources
- Central Cascades Wilderness Permits · USDA Forest Service, Willamette National Forest · Agency
- Three Sisters - Obsidian Trailhead, Central Cascades Wilderness Permit - Day Use · Recreation.gov · Agency
- Three Sisters: Scott Trail - Obsidian Loop, June 15, 2015 · Oregon Hikers forum, RobinB · Forum thread
- 8/30-9/1'08 Obsidian Trail-Three Sisters Wilderness · Oregon Hikers forum, fettster · Forum thread
- Obsidian Area, Three Sisters Wilderness · Ken Barber on Substack, Ken Barber · Blog
- Obsidian Basin, Opie Dilldock Pass, Collier Cone, Scott Springs, Obsidian Falls · NW Hiker · Blog
- Oregon's Obsidian Trail: $6 well spent · KVAL, from The Bulletin and AP, Mark Morical · Blog
- Scott and Obsidian trails combine for challenging loop · The Nugget Newspaper · Blog
- Three Sisters PCT backpack from McKenzie Pass (2000) · Washington Trails Association · Trip report