USFS National Forest System Trails · Lolo National Forest · Montana · Updated June 2026
Iron Mountain (USFS trail 242) is a 5.4 mi trail in Lolo National Forest, Montana. Mountain bikes are designated as allowed, Jun–Oct, with no Class 1 e-bike designation on record.
Can I bike Iron Mountain?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | Jun–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 Lolo National Forest, 34% of rideable trail miles are open to mountain bikes — a Bike Access Grade of C.
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About this trail
In Lolo National Forest, Montana, Iron Mountain (USFS trail 242) covers 5.4 mi of National Forest System trail. The figures here are pulled from the official US Forest Service trail data for Lolo 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. Mountain bikes are allowed, with a Jun–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 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 Iron Mountain?
- Yes. Mountain bikes are designated as allowed on Iron Mountain in Lolo National Forest, typically Jun–Oct, per USFS data.
- Are e-bikes allowed on Iron Mountain?
- No e-bike class (1, 2 or 3) is designated on Iron Mountain in the USFS data.
- How long is Iron Mountain?
- Iron Mountain measures about 5.4 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Iron Mountain?
- USFS data records the tread surface of Iron Mountain as native material.
- How difficult is Iron Mountain?
- 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 Lolo National Forest (USFS trail geometry isn't mapped).
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