USFS National Forest System Trails · Updated June 2026
Idaho Mountain Bike Trails
Across 7 national forests in Idaho, USFS data maps 5,602 mi of bike-designated trail on 1,686 segments, led by Caribou-Targhee National Forest (2,696 mi). Class 1 e-bikes are designated on 2,080 segments.
National forests in Idaho
| National forest | Bike miles | Total trail | Class 1 e-bike |
|---|---|---|---|
| Caribou-Targhee National Forest | 2,696 mi | 4,054 mi | 527 |
| Boise National Forest | 1,553 mi | 2,074 mi | 344 |
| Sawtooth National Forest | 782 mi | 2,323 mi | 318 |
| Salmon-Challis National Forest | 298 mi | 3,479 mi | 317 |
| Payette National Forest | 169 mi | 2,257 mi | 148 |
| Idaho Panhandle National Forests | 105 mi | 4,032 mi | 426 |
| Nez Perce-Clearwater National Forest | 0 mi | 5,367 mi | 0 |
E-bike rules in Idaho
On Forest Service land e-bikes are motor vehicles, allowed only where designated. See Idaho e-bike rules by class and forest →
Browse by grade-based difficulty
Steepness bands derived from the USFS grade field — a slope measure, not a technical mountain-bike rating.
Top trails in Idaho
The 30 longest ridable trails in Idaho by mapped mileage. Each links to its full USFS data profile.
Idaho bike-legal trail list (CSV)
Download every one of the 2,392 bike- and Class 1 e-bike-designated trails across Idaho's national forests — miles, surface, grade, season, and e-bike class per trail, from official USFS data.
Frequently asked questions
- How many miles of national-forest mountain bike trail are in Idaho?
- About 5,602 mi of bike-designated trail across 7 national forests, from USFS travel-management data.
- Which national forest has the most mountain biking in Idaho?
- Caribou-Targhee National Forest, with about 2,696 mi of bike-designated trail.
- Are e-bikes allowed in Idaho national forests?
- Only where designated — e-bikes are motor vehicles on Forest Service land. Class 1 access is recorded on 2,080 segments. See the Idaho e-bike rules page.