USFS National Forest System Trails · Custer Gallatin National Forest · Montana · Updated June 2026
Parkside (USFS trail 103) is a 7.5 mi trail in Custer Gallatin National Forest, Montana. Mountain bikes are designated as allowed, May–Oct, with no Class 1 e-bike designation on record.
Can I bike Parkside?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | May–Oct |
| 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
In Custer Gallatin National Forest, Montana, Parkside (USFS trail 103) covers 7.5 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. 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, with a May–Oct season 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 1 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 Parkside?
- Yes. Mountain bikes are designated as allowed on Parkside in Custer Gallatin National Forest, typically May–Oct, per USFS data.
- Are e-bikes allowed on Parkside?
- No e-bike class (1, 2 or 3) is designated on Parkside in the USFS data.
- How long is Parkside?
- Parkside measures about 7.5 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Parkside?
- USFS data records the tread surface of Parkside as native material.
- How difficult is Parkside?
- 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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