USFS National Forest System Trails · Custer Gallatin National Forest · Montana · Updated June 2026
Sacagawea Pass (USFS trail 518) is a 1.7 mi trail in Custer Gallatin National Forest, Montana. Mountain bikes are designated as allowed year-round, with no Class 1 e-bike designation on record.
Can I bike Sacagawea Pass?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | year-round |
| Class 1 e-bike (pedal-assist, 20 mph) | Restricted | — |
| Class 2 e-bike (throttle, 20 mph) | Restricted | — |
| Class 3 e-bike (pedal-assist, 28 mph) | Restricted | — |
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
Sacagawea Pass (USFS trail 518) is a 1.7 mi trail in Custer Gallatin National Forest, 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. No grade band is recorded, so a steepness-based difficulty isn't available for this trail. Mountain bikes are allowed, open year-round in the data. No e-bike class (1, 2 or 3) is designated on this trail in the USFS data, so treat it as a non-motorized route unless a posted order says otherwise. The route is mapped as USFS Trail Class 3 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 Sacagawea Pass?
- Yes. Mountain bikes are designated as allowed on Sacagawea Pass in Custer Gallatin National Forest, year-round, per USFS data.
- Are e-bikes allowed on Sacagawea Pass?
- No e-bike class (1, 2 or 3) is designated on Sacagawea Pass in the USFS data.
- How long is Sacagawea Pass?
- Sacagawea Pass measures about 1.7 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Sacagawea Pass?
- USFS data records the tread surface of Sacagawea Pass as native material.
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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