Limestone 121
USFS trail 8121
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.
0.4 mi · Typical grade 8 to 10%
About 150 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
- 0.4 mi mapped
- Grade
- Typical grade 8 to 10%
- Surface
- native material
- Motorized status
- Motorized use designated by the USFS
- Designation
- National trail designation
- National forest
- Black Hills National Forest