Flathead National Forest · Montana
Big River
44 mi of trail, end to end · native material surface · trail No. 155 · trail class 3 · typical grade 5-8% · tread 18-24 inches wide · hiking, horse
Trailhead Bear Creek Trailhead Drive there
Bear Creek Trailhead the Forest Service's write-up
season May 1 to
Trailhead for the Big River Trail #155 as it enters into the Great Bear Wilderness Area. Parking area, loading ramp, hitch rail, and vault toilet. Bear Creek River Access site is adjacent.
Restrictions Wilderness rules and regulations apply once inside the wilderness boundary. Please refer to the BMWC information for Rules and Regulations. Solid human waste containment and fire pan/blanket use is required in the Wild and Scenic Corridor. Camping prohibited longer than 3 nights. Please see the Middle Fork River Rules and Regulations.
This trailhead on fs.usda.gov
Every trail in Flathead National Forest
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.
