Gifford Pinchot National Forest · Washington
Trailhead Trailhead: Grassy Knoll Drive there
Provides access to: Grassy Knoll Trail #146 .
At 5.5. miles from the trailhead Grassy Knoll Trail ends at the Pacific Crest Trail #2000 .
Gravel parking lot at the trailhead is at the junction of road numbers 68 and 6800-511. Road is rough and winding.
Restrictions Closed to All Motorized Use. Bicycle use prohibited.
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.