USFS National Forest System Trails · Grand Mesa, Uncompahgre and Gunnison National Forests · Colorado · Updated June 2026
East Flatiron (USFS trail 8711.3B) is a 2.8 mi trail in Grand Mesa, Uncompahgre and Gunnison National Forests, Colorado. Mountain-bike use here is accepted but discouraged in USFS data, with Class 1 e-bikes also designated.
Can I bike East Flatiron?
| 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 |
This trail carries an accessibility designation in the USFS record.
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
East Flatiron (USFS trail 8711.3B) runs 2.8 mi through Grand Mesa, Uncompahgre and Gunnison National Forests in Colorado. 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. USFS records list its surface as native material. USFS slope data puts it in the Easy band (grade band 5-8%), meaning a gentle climb — keep in mind this measures steepness, not trail technicality. Note that mountain-bike use here is discouraged in USFS records — confirm with the ranger district before riding. On the electric side, Class 1, Class 2, Class 3 e-bikes are also designated — Class 1 being pedal-assist only, Classes 2 and 3 adding a throttle and higher assisted speed. 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, and the record carries an accessibility designation for this trail. 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 East Flatiron?
- Mountain-bike use on East Flatiron 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 East Flatiron?
- Class 1, Class 2, Class 3 e-bikes are designated on East Flatiron in the USFS data.
- How long is East Flatiron?
- East Flatiron measures about 2.8 mi in total, summed across its mapped National Forest System segments.
- What is the surface of East Flatiron?
- USFS data records the tread surface of East Flatiron as native material.
- How difficult is East Flatiron?
- Its grade-based difficulty is Easy (grade band 5-8%), 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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