Bitterroot National Forest
Bitterroot National Forest in Montana carries 2,265.7 miles of motorized routes from the U.S. Forest Service Motor Vehicle Use Map — 1,757.2 miles of roads and 508.5 miles of trails across 4 ranger districts. Open any district for its full per-vehicle access matrix (ATV, motorcycle, side-by-side, 4x4 and e-bike), seasons, a route-network map, and GPX downloads. These pages are informational; the controlling document is each district's official MVUM.
- Total motorized miles
- 2,265.7
- Ranger districts
- 4
- Roads
- 1,757.2 mi
- Trails
- 508.5 mi
1,757.2 mi of roads · 508.5 mi of trails · Forest code 0103.
Ranger districts in Montana
The district is the grain — pick one for its full per-vehicle access matrix, seasons, a route-network map and GPX downloads.
| Access highlights | ||||
|---|---|---|---|---|
| West Fork Ranger District | 753.4 | 539.2 | 214.2 | ATV 359.1 mi · Motorcycle 408.5 mi · E-bike routes |
| Darby Ranger District | 649.6 | 531.4 | 118.2 | ATV 79.4 mi · Motorcycle 147.1 mi · E-bike routes |
| Sula Ranger District | 596.7 | 457.9 | 138.8 | ATV 225.4 mi · Motorcycle 255.2 mi · E-bike routes |
| Stevensville Ranger District | 266 | 228.7 | 37.3 | ATV 38.5 mi · Motorcycle 44.2 mi · E-bike routes |
Data: U.S. Forest Service, Enterprise Data Warehouse (EDW) Motor Vehicle Use Map — Roads (layer 1) and Trails (layer 2), retrieved 2026-07-11. A work of the U.S. Government, public domain (17 U.S.C. §105). State assignment: U.S. Census Bureau TIGERweb state boundaries.
Forest-wide vehicle access
How many of this forest's ranger districts designate each vehicle class, and the total designated miles across the forest.
| Vehicle class | Districts | Open miles |
|---|---|---|
| ATV | 4 | 702.4 |
| Motorcycle / dirt bike | 4 | 855 |
| Other wheeled OHV | 4 | 696.5 |
| 4WD > 50" | 1 | 92 |
| 2WD > 50" | 1 | 92 |
| Tracked OHV > 50" | 1 | 91.6 |
| Other OHV > 50" | 1 | 91.6 |
| Tracked OHV < 50" | 1 | 91.6 |
| Other OHV < 50" | 1 | 91.6 |
| Passenger vehicle | 4 | 1,496.1 |
| High-clearance vehicle | 4 | 1,496.1 |
| Truck | 4 | 1,496.1 |
| Bus | 4 | 1,496.1 |
| Motorhome | 4 | 1,496.1 |
These pages summarise the Forest Service Motor Vehicle Use Map data; they are not the official MVUM and not legal documents. The controlling document is each district's official Motor Vehicle Use Map — carry it and follow posted signs.
Data vintage: USFS EDW MVUM, retrieved 2026-07-11.
Explore
Browse all Montana national-forest routes, read the methodology, or learn what an MVUM is.