USFS National Forest System Trails · Mark Twain National Forest · Missouri · Updated June 2026
Swan Creek-Sly Top (USFS trail 21-6105) is a 2.3 mi trail in Mark Twain National Forest, Missouri. Mountain bikes are designated as allowed year-round, with no Class 1 e-bike designation on record.
Can I bike Swan Creek-Sly Top?
| 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 Mark Twain National Forest, 100% of rideable trail miles are open to mountain bikes — a Bike Access Grade of A.
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About this trail
Swan Creek-Sly Top (USFS trail 21-6105) is a 2.3 mi trail in Mark Twain National Forest, Missouri. The figures here are pulled from the official US Forest Service trail data for Mark Twain 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. 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. 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 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 Mark Twain National Forest.
Frequently asked questions
- Can you mountain bike on Swan Creek-Sly Top?
- Yes. Mountain bikes are designated as allowed on Swan Creek-Sly Top in Mark Twain National Forest, year-round, per USFS data.
- Are e-bikes allowed on Swan Creek-Sly Top?
- No e-bike class (1, 2 or 3) is designated on Swan Creek-Sly Top in the USFS data.
- How long is Swan Creek-Sly Top?
- Swan Creek-Sly Top measures about 2.3 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Swan Creek-Sly Top?
- USFS data records the tread surface of Swan Creek-Sly Top as native material.
- How difficult is Swan Creek-Sly Top?
- 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 Mark Twain National Forest (USFS trail geometry isn't mapped).
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