USFS National Forest System Trails · Custer Gallatin National Forest · Montana · Updated June 2026
Rock Creek North (USFS trail 270) is a 8.5 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 Rock Creek North?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | year-round |
| Class 1 e-bike (pedal-assist, 20 mph) | Allowed | Jun–Oct |
| Class 2 e-bike (throttle, 20 mph) | Allowed | Jun–Oct |
| Class 3 e-bike (pedal-assist, 28 mph) | Allowed | Jun–Oct |
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
In Custer Gallatin National Forest, Montana, Rock Creek North (USFS trail 270) covers 8.5 mi of National Forest System trail. 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. The tread is mapped as native material. Its grade-based difficulty is Advanced (grade band +12-20%) — a steep steepness profile derived from USFS slope data, not a technical mountain-bike rating. Bike use is designated as allowed year-round. On the electric side, Class 1, Class 2, Class 3 e-bikes are also designated (Jun–Oct) — 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 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. For day-of certainty on closures or seasonal orders, check directly with the ranger district, since this reflects the USFS data as of the latest refresh.
Frequently asked questions
- Can you mountain bike on Rock Creek North?
- Yes. Mountain bikes are designated as allowed on Rock Creek North in Custer Gallatin National Forest, year-round, per USFS data.
- Are e-bikes allowed on Rock Creek North?
- Class 1, Class 2, Class 3 e-bikes are designated on Rock Creek North in the USFS data.
- How long is Rock Creek North?
- Rock Creek North measures about 8.5 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Rock Creek North?
- USFS data records the tread surface of Rock Creek North as native material.
- How difficult is Rock Creek North?
- 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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