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Central Cascades Obsidian permit

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.

From USDA Forest Service, Willamette National Forest

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.

From The Nugget Newspaper and Ken Barber on Substack

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

12 people can go on one permit. Split this list between them so nobody carries two stoves.

Plan a trip here

What 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.

    From Ken Barber on Substack

  • 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.

    From The Nugget Newspaper and Ken Barber on Substack

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.

From The Nugget Newspaper and Ken Barber on Substack

Sources

  1. Central Cascades Wilderness Permits · USDA Forest Service, Willamette National Forest · Agency
  2. Three Sisters - Obsidian Trailhead, Central Cascades Wilderness Permit - Day Use · Recreation.gov · Agency
  3. Three Sisters: Scott Trail - Obsidian Loop, June 15, 2015 · Oregon Hikers forum, RobinB · Forum thread
  4. 8/30-9/1'08 Obsidian Trail-Three Sisters Wilderness · Oregon Hikers forum, fettster · Forum thread
  5. Obsidian Area, Three Sisters Wilderness · Ken Barber on Substack, Ken Barber · Blog
  6. Obsidian Basin, Opie Dilldock Pass, Collier Cone, Scott Springs, Obsidian Falls · NW Hiker · Blog
  7. Oregon's Obsidian Trail: $6 well spent · KVAL, from The Bulletin and AP, Mark Morical · Blog
  8. Scott and Obsidian trails combine for challenging loop · The Nugget Newspaper · Blog
  9. Three Sisters PCT backpack from McKenzie Pass (2000) · Washington Trails Association · Trip report