USFS National Forest System Trails · Custer Gallatin National Forest · Montana · Updated June 2026
Oil Well (USFS trail 68) is a 10.5 mi trail in Custer Gallatin National Forest, Montana. Mountain bikes are designated as allowed year-round, with Class 1 e-bikes also designated.
Can I bike Oil Well?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | year-round |
| Class 1 e-bike (pedal-assist, 20 mph) | Allowed | Jul–Dec |
| Class 2 e-bike (throttle, 20 mph) | Allowed | Jul–Dec |
| Class 3 e-bike (pedal-assist, 28 mph) | Allowed | Jul–Dec |
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
Oil Well (USFS trail 68) runs 10.5 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. USFS slope data puts it in the Advanced band (grade band +12-20%), meaning a steep climb — keep in mind this measures steepness, not trail technicality. Bike use is designated as allowed year-round. The record additionally permits Class 1, Class 2, Class 3 e-bike use, Jul–Dec; recall that Class 1 is pedal-assist, while Class 2 adds a throttle and Class 3 a higher cutoff speed. The route is mapped as USFS Trail Class 4 on the agency's 1-to-5 development scale, where 1 is the most primitive, minimally maintained tread and 5 is the most developed. Treat this as a planning reference rather than a live conditions report, and verify any time-sensitive closure or order with the ranger district that manages Custer Gallatin National Forest.
Frequently asked questions
- Can you mountain bike on Oil Well?
- Yes. Mountain bikes are designated as allowed on Oil Well in Custer Gallatin National Forest, year-round, per USFS data.
- Are e-bikes allowed on Oil Well?
- Class 1, Class 2, Class 3 e-bikes are designated on Oil Well in the USFS data.
- How long is Oil Well?
- Oil Well measures about 10.5 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Oil Well?
- USFS data records the tread surface of Oil Well as native material.
- How difficult is Oil Well?
- Its grade-based difficulty is Advanced (grade band +12-20%), 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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