USFS National Forest System Trails · Montana · Updated October 2026
Can You Mountain Bike in Custer Gallatin National Forest, Montana?
Yes — Custer Gallatin National Forest in Montana has 2,189 mi of bike-designated National Forest System trail across 550 segments, typically open Year-round, according to official USFS travel-management data.
- Bike-designated
- 2,189 mi550 segments
- Total NFS trail
- 3,612 mi2,090 segments
- Bike season
- Year-roundUSFS managed-use
- ADA-accessible
- 5trail segments
61% of this forest's mapped trail is bike-designated. USFS records trail grade (steepness), not technical MTB difficulty — we surface grade where present but do not infer a black/blue/green rating.
Bike-designated trails in Custer Gallatin National Forest
| Trail | Miles | Surface | Bike season |
|---|---|---|---|
| Boone Peak | 23.29 | Native Material | Year-round |
| Bangtail Divide | 22.71 | Native Material | Year-round |
| West Fork Stillwater | 22.17 | Native Material | Year-round |
| Skyline | 20.82 | Native Material | Year-round |
| Bridger Foothills | 20.55 | Native Material | Year-round |
| Lightning Creek | 19.88 | Native Material | Year-round |
| Mount Maurice | 19.36 | Native Material | Year-round |
| Red Cub | 18.72 | Native Material | Year-round |
| Line Creek Plateau | 17.93 | Native Material | Year-round |
| Wicked Creek | 17.19 | Native Material | Year-round |
| Cherry Creek | 16.9 | Native Material | Year-round |
| Slough Creek | 16.58 | Native Material | May–Oct |
| West Fork Rock Creek | 16.5 | Native Material | Year-round |
| Bridger Ridge | 16.42 | Native Material | Year-round |
| Porcupine Ibex | 16.25 | Native Material | Year-round |
Frequently asked questions
- How many miles of mountain bike trail are in Custer Gallatin National Forest?
- Custer Gallatin National Forest has about 2,189 mi of bike-designated trail across 550 segments, out of 3,612 mi of total National Forest System trail.
- Are e-bikes allowed in Custer Gallatin National Forest?
- Only where designated — on Forest Service land e-bikes are motor vehicles. Class 1 e-bikes are recorded on 380 segments here.
- What is the mountain-bike season in Custer Gallatin National Forest (Montana)?
- Most bike-designated trails carry a Year-round season in USFS data; higher-elevation trails open later.