USFS National Forest System Trails · Custer Gallatin National Forest · Montana · Updated June 2026
40011 (USFS trail 40011) is a 0.7 mi trail in Custer Gallatin National Forest, Montana. Mountain bikes are designated as allowed, Jan–Aug, December, with Class 1 e-bikes also designated.
Can I bike 40011?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | Jan–Aug, December |
| Class 1 e-bike (pedal-assist, 20 mph) | Allowed | Jan–Aug, December |
| Class 2 e-bike (throttle, 20 mph) | Allowed | Jan–Aug, December |
| Class 3 e-bike (pedal-assist, 28 mph) | Allowed | Jan–Aug, December |
Zooming out: across Custer Gallatin National Forest, 98% of rideable trail miles are open to mountain bikes — a Bike Access Grade of A.
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About this trail
40011 (USFS trail 40011) runs 0.7 mi through Custer Gallatin National Forest in Montana. The figures here are pulled from the official US Forest Service trail data for Custer Gallatin National Forest, covering the trail's mileage, tread, grade band, and the bike and e-bike uses the agency lists as designated. USFS records list its surface as native material. Based on slope, this is a Intermediate trail (grade band +8-10%); that reflects moderate gradient and is not the same as a technical MTB difficulty rating. Mountain bikes are allowed, with a Jan–Aug, December season in the data. On the electric side, Class 1, Class 2, Class 3 e-bikes are also designated (Jan–Aug, December) — Class 1 being pedal-assist only, Classes 2 and 3 adding a throttle and higher assisted speed. The route is mapped as USFS Trail Class 2 on the agency's 1-to-5 development scale, where 1 is the most primitive, minimally maintained tread and 5 is the most developed. Because conditions, closures, and local orders change between data refreshes, confirm the current status with the managing ranger district before you ride.
Frequently asked questions
- Can you mountain bike on 40011?
- Yes. Mountain bikes are designated as allowed on 40011 in Custer Gallatin National Forest, typically Jan–Aug, December, per USFS data.
- Are e-bikes allowed on 40011?
- Class 1, Class 2, Class 3 e-bikes are designated on 40011 in the USFS data.
- How long is 40011?
- 40011 measures about 0.7 mi in total, summed across its mapped National Forest System segments.
- What is the surface of 40011?
- USFS data records the tread surface of 40011 as native material.
- How difficult is 40011?
- Its grade-based difficulty is Intermediate (grade band +8-10%), derived from USFS slope data. This reflects steepness, not technical mountain-bike difficulty.
How we read this data
Grade-based difficulty above is the USFS grade (route steepness), not a technical mountain-bike rating — a gentle-grade trail can still be rocky or technical, and vice versa. Bike and e-bike status come verbatim from the USFS managed-use fields for this trail; we never infer access we can't cite. See our methodology for how the dataset is built and what each field means.
Where it is
Approximate location of Custer Gallatin National Forest (USFS trail geometry isn't mapped).
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