USFS National Forest System Trails · Custer Gallatin National Forest · Montana · Updated June 2026
Dead Horse Divide (USFS trail 3058A) is a 5.4 mi trail in Custer Gallatin National Forest, Montana. Mountain bikes are designated as allowed, Jan–Oct, December, with Class 1 e-bikes also designated.
Can I bike Dead Horse Divide?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | Jan–Oct, December |
| Class 1 e-bike (pedal-assist, 20 mph) | Allowed | Jan–Oct, December |
| Class 2 e-bike (throttle, 20 mph) | Allowed | Jan–Oct, December |
| Class 3 e-bike (pedal-assist, 28 mph) | Allowed | Jan–Oct, 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
Dead Horse Divide (USFS trail 3058A) runs 5.4 mi through Custer Gallatin National Forest in Montana. This profile summarizes what the official US Forest Service trail record says about riding it: how long the trail is, what it's built on, how steep the route grades out, and which forms of bike use the agency has designated. USFS records list its surface as native material. Its grade-based difficulty is Easy (grade band +0-5%) — a gentle steepness profile derived from USFS slope data, not a technical mountain-bike rating. Mountain bikes are allowed, with a Jan–Oct, December season in the data. On the electric side, Class 1, Class 2, Class 3 e-bikes are also designated (Jan–Oct, 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 Dead Horse Divide?
- Yes. Mountain bikes are designated as allowed on Dead Horse Divide in Custer Gallatin National Forest, typically Jan–Oct, December, per USFS data.
- Are e-bikes allowed on Dead Horse Divide?
- Class 1, Class 2, Class 3 e-bikes are designated on Dead Horse Divide in the USFS data.
- How long is Dead Horse Divide?
- Dead Horse Divide measures about 5.4 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Dead Horse Divide?
- USFS data records the tread surface of Dead Horse Divide as native material.
- How difficult is Dead Horse Divide?
- Its grade-based difficulty is Easy (grade band +0-5%), 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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