USFS travel-management data · Updated June 2026
E-Bikes on Custer Gallatin National Forest Trails
In Custer Gallatin National Forest, USFS travel-management data records Class 1 e-bike access on 381 trail segments (1,378 mi), Class 2 on 381, and Class 3 on 381. Conventional (non-motorized) mountain bikes are designated on 552 segments. On Forest Service land an e-bike is a motor vehicle, so it is allowed only where designated.
E-bike access by class
Where a trail is open to conventional bikes, check the e-bike columns separately — a non-motorized mountain bike being allowed does not by itself mean an e-bike is.
| E-bike class | Definition | Trail segments with access | Miles |
|---|---|---|---|
| Class 1 designated | Pedal-assist only, motor cuts out at 20 mph, no throttle. | 381 | 1,378 mi |
| Class 2 designated | Throttle-assist up to 20 mph (can propel without pedaling). | 381 | 1,378 mi |
| Class 3 designated | Pedal-assist up to 28 mph, no throttle. | 381 | 1,378 mi |
Trail-by-trail (largest bike trails)
Conventional-bike and Class 1 e-bike status with season windows, per USFS designation.
| Trail | Miles | Bike | Class 1 e-bike | Season |
|---|---|---|---|---|
| Boone Peak | 23.29 | Allowed | Allowed | Year-round |
| Bangtail Divide | 22.71 | Allowed | Allowed | Year-round |
| West Fork Stillwater | 22.17 | Allowed | Restricted | Year-round |
| Skyline | 20.82 | Allowed | Allowed | Year-round |
| Bridger Foothills | 20.55 | Allowed | Allowed | Year-round |
| Lightning Creek | 19.88 | Allowed | Restricted | Year-round |
| Cinnamon Buck | 19.36 | Allowed | Allowed | Year-round |
| Red Cub | 18.72 | Allowed | Allowed | Year-round |
| Buck Ridge | 17.93 | Allowed | Allowed | Year-round |
| Wicked Creek | 17.19 | Allowed | Allowed | Year-round |
| Cherry Creek | 16.9 | Allowed | Restricted | Year-round |
| Slough Creek | 16.58 | Allowed | Allowed | May–Oct |
| West Fork Rock Creek | 16.5 | Allowed | Allowed | Year-round |
| Bridger Ridge | 16.42 | Allowed | Allowed | Year-round |
| Porcupine Ibex | 16.25 | Allowed | Allowed | Year-round |
| Hellroaring Plateau | 16.15 | Allowed | Restricted | Year-round |
| Buck Ridge (Snowmo) | 16 | Allowed | — | |
| Phantom Creek | 15.21 | Allowed | Restricted | Year-round |
| Tucker Creek | 14.91 | Allowed | Restricted | May–Oct |
| King Creek | 14.88 | Allowed | Allowed | Year-round |
| Inspiration Divide | 14.87 | Allowed | Allowed | Year-round |
| Bear Canyon | 14.53 | Allowed | Allowed | Year-round |
| Red Lodge Creek | 14.45 | Allowed | Restricted | Year-round |
| Bear Basin | 14.19 | Allowed | Restricted | Year-round |
| Upsidedown Creek | 13.91 | Allowed | Restricted | May–Oct |
| Telephone Basin | 13.88 | Allowed | Restricted | May–Oct |
| East Fork Boulder | 13.81 | Allowed | Allowed | May–Oct |
| Two Top Divide | 13.35 | Allowed | Restricted | Jun–Dec |
| Bridge Creek | 13.1 | Allowed | Restricted | Year-round |
| Eightmile | 13.01 | Allowed | Restricted | Year-round |
| Lower Deer Creek | 12.98 | Allowed | Allowed | Year-round |
| East Fork Mill Creek | 12.85 | Allowed | Restricted | Year-round |
| Pumpkin-Otter Divide | 11.94 | Allowed | Allowed | Year-round |
| South Cottonwood | 11.88 | Allowed | Restricted | Year-round |
| Basin Lakes | 11.84 | Allowed | Restricted | Year-round |
| Porcupine Creek | 11.81 | Allowed | Allowed | Year-round |
| East Trunk | 11.31 | Allowed | Restricted | Year-round |
| Lost Wolverine | 11.2 | Allowed | Allowed | Year-round |
| North Cottonwood | 11.09 | Allowed | Restricted | Year-round |
| Cabin Creek Divide | 11.04 | Allowed | Allowed | Year-round |
Frequently asked questions
- Are e-bikes allowed in Custer Gallatin National Forest?
- On National Forest System land, e-bikes are legally motor vehicles. Under U.S. Forest Service policy (36 CFR 212; FSM 7700), an e-bike of any class may be ridden only on routes that are designated for motor-vehicle use or specifically designated for e-bike use — not on every trail where a conventional (non-motorized) mountain bike is allowed. In Custer Gallatin National Forest, Class 1 access is recorded on 381 trail segments; Class 2 and 3 on 381 and 381 respectively.
- Does an e-bike count as a mountain bike on Custer Gallatin National Forest trails?
- No. Under USFS policy an e-bike of any class is a motor vehicle, even Class 1 pedal-assist. A trail being open to conventional bikes does not by itself permit e-bikes — the trail must carry an e-bike or motorized designation.
- When are bikes open in Custer Gallatin National Forest?
- Most bike-designated trails in Custer Gallatin National Forest carry a Year-round season window in the USFS data; higher-elevation trails open later as snow clears. Always confirm current conditions with the ranger district.
See also: Custer Gallatin National Forest trail data profile · E-bikes across Montana
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