Porcupine Loop
USFS trail SNO-724G
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.
13.3 mi · Typical grade 12 to 20%
About 1,100 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
- 13.3 mi mapped
- Grade
- Typical grade 12 to 20%
- Surface
- snow
- Designation
- National trail designation
- National forest
- Sawtooth National Forest
Length is the trail as the Forest Service maps it, not a trip distance. Hike out and back and you will cover it twice; check the shape of the route before you count on the figure.