USFS National Forest System Trails · Custer Gallatin National Forest · Montana · Updated June 2026
Tepee Basin (USFS trail 89) is a 0.8 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 Tepee Basin?
| 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.
Watch Custer Gallatin National Forest for access changes
Email me when USFS mountain-bike or e-bike designations change for trails in Custer Gallatin National Forest. Free, unsubscribe anytime.
About this trail
In Custer Gallatin National Forest, Montana, Tepee Basin (USFS trail 89) covers 0.8 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. Underfoot, the trail is recorded as native material. Based on slope, this is a Advanced trail (grade band +12-20%); that reflects steep gradient and is not the same as a technical MTB difficulty rating. Mountain bikes are allowed, open year-round in the data. The agency lists no Class 1, 2 or 3 e-bike designation here; absent a local order to the contrary, that means e-bikes are not an allowed use on this trail. 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. 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 Tepee Basin?
- Yes. Mountain bikes are designated as allowed on Tepee Basin in Custer Gallatin National Forest, year-round, per USFS data.
- Are e-bikes allowed on Tepee Basin?
- No e-bike class (1, 2 or 3) is designated on Tepee Basin in the USFS data.
- How long is Tepee Basin?
- Tepee Basin measures about 0.8 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Tepee Basin?
- USFS data records the tread surface of Tepee Basin as native material.
- How difficult is Tepee Basin?
- 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).
Where to stay near Custer Gallatin National Forest
Find hotels, cabins, and vacation rentals near Custer Gallatin National Forest — plan your ride.
Top-rated places to stay near Custer Gallatin National Forest
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Riding Custer Gallatin National Forest?
Trail-access updates and trip ideas by email.