Updated October 2026
Idaho Mountain Bike Trails
Mountain bike
5,602mi
designated on 1,686 segments
24% of mapped trail
E-bike
7,528miClass 1
designated on 2,080 segments
32% of mapped trail
Mountain bike
5,602mi
designated on 1,686 segments
24% of mapped trail
E-bike
7,528miClass 1
designated on 2,080 segments
- Class 17,528 mi
- Class 27,528 mi
- Class 37,528 mi
Treated as a motor vehicle: ridden only where designated.
- National forests
- 7
- Ridable trails
- 2,392
Both lanes share one scale: the 23,587 mi of National Forest System trail mapped in Idaho's 7 national forests. From USFS National Forest System Trails records, updated October 2026.
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 | 3,481 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.