USFS National Forest System Trails · Medicine Bow-Routt National Forest · Colorado · Updated June 2026
South Fork Labonte Spur C (USFS trail 635.C) is a 0.8 mi trail in Medicine Bow-Routt National Forest, Colorado. Mountain-bike use here is accepted but discouraged in USFS data, with Class 1 e-bikes also designated.
Can I bike South Fork Labonte Spur C?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Accepted but discouraged | — |
| Class 1 e-bike (pedal-assist, 20 mph) | Allowed | year-round |
| Class 2 e-bike (throttle, 20 mph) | Allowed | year-round |
| Class 3 e-bike (pedal-assist, 28 mph) | Allowed | year-round |
Zooming out: across Medicine Bow-Routt National Forest, 14% of rideable trail miles are open to mountain bikes — a Bike Access Grade of D.
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About this trail
In Medicine Bow-Routt National Forest, Colorado, South Fork Labonte Spur C (USFS trail 635.C) covers 0.8 mi of National Forest System trail. This profile summarizes what the official US Forest Service trail record says about riding it: how long the trail is, what it's built on, how steep the route grades out, and which forms of bike use the agency has 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. Note that mountain-bike use here is discouraged in USFS records — confirm with the ranger district before riding. The record additionally permits Class 1, Class 2, Class 3 e-bike use; recall that Class 1 is pedal-assist, while Class 2 adds a throttle and Class 3 a higher cutoff speed. 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. 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 South Fork Labonte Spur C?
- Mountain-bike use on South Fork Labonte Spur C is discouraged in USFS records, though Class 1 e-bike use is designated. Confirm current rules with the managing ranger district.
- Are e-bikes allowed on South Fork Labonte Spur C?
- Class 1, Class 2, Class 3 e-bikes are designated on South Fork Labonte Spur C in the USFS data.
- How long is South Fork Labonte Spur C?
- South Fork Labonte Spur C measures about 0.8 mi in total, summed across its mapped National Forest System segments.
- What is the surface of South Fork Labonte Spur C?
- USFS data records the tread surface of South Fork Labonte Spur C as native material.
- How difficult is South Fork Labonte Spur C?
- 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 Medicine Bow-Routt National Forest (USFS trail geometry isn't mapped).
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