Willamette National Forest · Oregon

Obsidian

5.3 mi of trail, end to end · native material surface · trail No. 3528 · trail class 3 · typical grade 12-20% · tread 18-24 inches wide · hiking, horse

Begins at the forest's mile 0, 44.2051, -121.8705 - no trailhead mapped Drive to where the trail begins

Obsidian Hiker Trailhead the Forest Service's write-up

$5/vehicle/day or a valid <a href="https://www.fs.usda.gov/main/willamette/passes-permits/recreation">recreation pass</a>. No payment accepted onsite.

This trailhead provides access to:

Obsidian Trail #3528

Obsidian Tie Trail

Scott Trail #3531

Pacific Crest Trail #2000

See trail pages for more information.

Restrictions <ul><li><a href="http://www.fs.usda.gov/detail/willamette/recreation/?cid=stelprdb5097165">Wilderness Regulations</a></li><li><a href="http://www.fs.usda.gov/detail/willamette/learning/safety-ethics/?cid=stelprdb5098066">Weed Free Feed Required</a></li><li><a href="http://www.fs.usda.gov/detail/willamette/recreation/?cid=stelprdb5097776">Special Area Regulations for Three Sisters Wilderness</a></li></ul>

This trailhead on fs.usda.gov

Obsidian Stock Trailhead the Forest Service's write-up

$5/vehicle/day or a valid <a href="https://www.fs.usda.gov/main/willamette/passes-permits/recreation">recreation pass</a>. No payment accepted onsite.

This trailhead provides access to:

Obsidian Tie Trail

Obsidian Trail #3528

Scott Trail #3531

Pacific Crest Trail #2000

See trail pages for more information.

Restrictions <ul><li><a href="http://www.fs.usda.gov/detail/willamette/?cid=stelprdb5097165">Wilderness Regulations</a></li><li><a href="http://www.fs.usda.gov/detail/willamette/?cid=stelprdb5098066">Weed Free Feed Required</a></li><li><a href="http://www.fs.usda.gov/detail/willamette/?cid=stelprdb5097776">Special Area Regulations for Three Sisters Wilderness</a></li></ul>

This trailhead on fs.usda.gov

Every trail in Willamette National Forest

All 410 trails in Willamette National ForestFind a trailForest on fs.usda.gov

About this trail's facts

The lines are the US Forest Service's National Forest System trails layer (public domain), read 2026-10-16 and simplified for the map; the length is the line's, end to end, and the class, surface, grade and tread width are the forest's own entries where it publishes them - a forest that publishes the centreline alone has none. The trailheads and the points along the way are the Service's recreation points, and the write-ups its own recarea text, unedited. Heights come from USGS 3DEP through Terrain Tiles on AWS (Mapzen/Tilezen), read along each line and rounded; a short trail on steep ground can be off by a few tens of feet. Closures change: check the forest's own site before you go.