USFS National Forest System Trails · Updated October 2026
Where Can You Mountain Bike in Montana?
Across 7 national forests in Montana, USFS data maps 4,826 mi of bike-designated trail on 1,234 segments, led by Helena-Lewis and Clark National Forest with 2,202 mi. These are the National Forest System trails where mountain bikes are officially designated.
- Bike-designated
- 4,826 mi1,234 segments
- Total NFS trail
- 18,619 mi
- National forests
- 7
- Class 1 e-bike
- 3,223 mi878 segments
Montana national forests by bike-designated trail
| National forest | Bike miles | Class 1 e-bike segments |
|---|---|---|
| Helena-Lewis and Clark National Forest | 2,202 mi | 323 |
| Custer Gallatin National Forest | 2,189 mi | 380 |
| Lolo National Forest | 182 mi | 77 |
| Kootenai National Forest | 120 mi | 30 |
| Flathead National Forest | 79.6 mi | 67 |
| Beaverhead-Deerlodge National Forest | 54.3 mi | 1 |
| Bitterroot National Forest | 0 mi | 0 |
Frequently asked questions
- How many miles of national-forest mountain bike trail are in Montana?
- About 4,826 mi of bike-designated trail across 7 national forests, from USFS travel-management data.
- Which national forest has the most mountain biking in Montana?
- Helena-Lewis and Clark National Forest, with about 2,202 mi of bike-designated trail.