USFS National Forest System Trails · Grand Mesa, Uncompahgre and Gunnison National Forests · Colorado · Updated June 2026
Thousand Acre Flat (USFS trail 8806) is a 2.3 mi trail in Grand Mesa, Uncompahgre and Gunnison National Forests, Colorado. Mountain bikes are designated as allowed year-round, with Class 1 e-bikes also designated.
Can I bike Thousand Acre Flat?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | year-round |
| 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 Grand Mesa, Uncompahgre and Gunnison National Forests, 96% of rideable trail miles are open to mountain bikes — a Bike Access Grade of A.
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About this trail
In Grand Mesa, Uncompahgre and Gunnison National Forests, Colorado, Thousand Acre Flat (USFS trail 8806) covers 2.3 mi of National Forest System trail. Everything below comes straight from the US Forest Service National Forest System Trails dataset — length, surface, slope-derived difficulty, and the specific bike and e-bike designations on record — so you can check legality before you load up. Underfoot, the trail is recorded as native material. USFS slope data puts it in the Advanced band (grade band 12-20%), meaning a steep climb — keep in mind this measures steepness, not trail technicality. Bike use is designated as allowed year-round. 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. 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 Thousand Acre Flat?
- Yes. Mountain bikes are designated as allowed on Thousand Acre Flat in Grand Mesa, Uncompahgre and Gunnison National Forests, year-round, per USFS data.
- Are e-bikes allowed on Thousand Acre Flat?
- Class 1, Class 2, Class 3 e-bikes are designated on Thousand Acre Flat in the USFS data.
- How long is Thousand Acre Flat?
- Thousand Acre Flat measures about 2.3 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Thousand Acre Flat?
- USFS data records the tread surface of Thousand Acre Flat as native material.
- How difficult is Thousand Acre Flat?
- 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 Grand Mesa, Uncompahgre and Gunnison National Forests (USFS trail geometry isn't mapped).
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