USFS National Forest System Trails · Updated June 2026
Colorado Mountain Bike Trails
Across 7 national forests in Colorado, USFS data maps 4,227 mi of bike-designated trail on 1,368 segments, led by Grand Mesa, Uncompahgre and Gunnison National Forests (1,723 mi). Class 1 e-bikes are designated on 989 segments.
National forests in Colorado
| National forest | Bike miles | Total trail | Class 1 e-bike |
|---|---|---|---|
| Grand Mesa, Uncompahgre and Gunnison National Forests | 1,723 mi | 3,787 mi | 319 |
| White River National Forest | 915 mi | 2,674 mi | 100 |
| Arapaho and Roosevelt National Forests | 620 mi | 1,440 mi | 53 |
| Pike and San Isabel National Forests | 618 mi | 2,360 mi | 182 |
| San Juan National Forest | 218 mi | 1,931 mi | 131 |
| Medicine Bow-Routt National Forest | 134 mi | 2,367 mi | 145 |
| Rio Grande National Forest | 0 mi | 1,247 mi | 59 |
E-bike rules in Colorado
On Forest Service land e-bikes are motor vehicles, allowed only where designated. See Colorado 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 Colorado
The 30 longest ridable trails in Colorado by mapped mileage. Each links to its full USFS data profile.
Colorado bike-legal trail list (CSV)
Download every one of the 1,584 bike- and Class 1 e-bike-designated trails across Colorado'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 Colorado?
- About 4,227 mi of bike-designated trail across 7 national forests, from USFS travel-management data.
- Which national forest has the most mountain biking in Colorado?
- Grand Mesa, Uncompahgre and Gunnison National Forests, with about 1,723 mi of bike-designated trail.
- Are e-bikes allowed in Colorado national forests?
- Only where designated — e-bikes are motor vehicles on Forest Service land. Class 1 access is recorded on 989 segments. See the Colorado e-bike rules page.