Big River
USFS trail 155
The route in 3D
Fly this trail over real terrain
USGS and partner elevation data build the terrain, and the US Forest Service centerline draws the route.
43.9 mi · Typical grade 5 to 8%
About 1,750 ft between the route's high and low points. An estimate from US government elevation data, computed 2026-07-11; not measured in the field.
Trail facts
- Length
- 43.9 mi mapped
- Grade
- Typical grade 5 to 8%
- Surface
- native material
- USFS-managed uses
- Horseback (pack and saddle)
- Motorized status
- Non-motorized (USFS designation)
- Accessibility
- Not listed by the USFS as accessible