South Fork Sun River Trail
1 days · 28.2 mi · moderate · Multi-day trek
Quick facts
What the South Fork Sun River Trail is known for
This 28.2-mile route follows the South Fork Sun River through the Bob Marshall Wilderness. Its 4,065 feet of gain make it a moderate trip with meaningful climbing.
Elevation profile
Elevation ranges from 15,545 ft to 20,925 ft over 28.2 mi. Measured from OSM geometry (approximate).
- Uphill 13.3 mi · 58%
- Downhill 4.3 mi · 19%
- Flat 5.4 mi · 23%
Ridgefold breaks every route into uphill, downhill, and flat — see the full per-day breakdown in the app.
How hard is the South Fork Sun River Trail?
On the Ridgefold Difficulty Index, the South Fork Sun River Trail scores 17/100, a relative rating across the 1,243 trails we've mapped, blending distance, elevation gain, and steepness. It is a comparison within our set, not an official rating.
Frequently asked questions
How much elevation gain is on the South Fork Sun River Trail?
The South Fork Sun River Trail climbs roughly 4,065 ft total — about 144 ft per mile, topping out near 7,448 ft.
Related trails
Sources & attribution
Route geometry from the USDA Forest Service National Forest System Trails dataset (EDW), a work of the US federal government in the public domain. Stats are approximate and may differ from official surveys; permit rules and conditions change — verify with the managing authority before your trip. Last reviewed July 2026.