Grindstone Spur
USFS trail 91B
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.
0.8 mi · Typical grade 12 to 20%
About 100 ft between the route's high and low points. An estimate from USGS elevation data, computed 2026-07-10; not measured in the field.
Trail facts
- Length
- 0.8 mi mapped
- Grade
- Typical grade 12 to 20%
- Surface
- native material
- USFS-managed hiker season
- year-round
- USFS-managed uses
- Hiking, Horseback (pack and saddle)
- Motorized status
- Non-motorized (USFS designation)