The Underground
USFS trail 1070
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.
4.3 mi · Typical grade 8 to 10%
About 200 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
- 4.3 mi mapped
- Grade
- Typical grade 8 to 10% (USFS trail class TG03)
- Surface
- native material
- Motorized status
- Non-motorized (USFS designation)
- Accessibility
- Not listed by the USFS as accessible
- Designation
- National trail designation