USFS National Forest System Trails · Lolo National Forest · Montana · Updated June 2026
Southside Spur (USFS trail 9.2) is a 0.6 mi trail in Lolo National Forest, Montana. Mountain bikes are designated as allowed year-round, with no Class 1 e-bike designation on record.
Can I bike Southside Spur?
| 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 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
Southside Spur (USFS trail 9.2) is a 0.6 mi trail in Lolo National Forest, Montana. 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. USFS records list its surface as native material. USFS slope data puts it in the Intermediate band (grade band 10-12%), meaning a moderate climb — keep in mind this measures steepness, not trail technicality. Bike use is designated as allowed year-round. 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 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. 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 Southside Spur?
- Yes. Mountain bikes are designated as allowed on Southside Spur in Lolo National Forest, year-round, per USFS data.
- Are e-bikes allowed on Southside Spur?
- No e-bike class (1, 2 or 3) is designated on Southside Spur in the USFS data.
- How long is Southside Spur?
- Southside Spur measures about 0.6 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Southside Spur?
- USFS data records the tread surface of Southside Spur as native material.
- How difficult is Southside Spur?
- Its grade-based difficulty is Intermediate (grade band 10-12%), 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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