USFS National Forest System Trails · Eldorado National Forest · California · Updated June 2026
Mace Mill Loop (USFS trail 11E18) is a 6.1 mi trail in Eldorado National Forest, California. Mountain bikes are designated as allowed year-round, with Class 1 e-bikes also designated.
Can I bike Mace Mill Loop?
| 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 Eldorado National Forest, 94% of rideable trail miles are open to mountain bikes — a Bike Access Grade of A.
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About this trail
Mace Mill Loop (USFS trail 11E18) is a 6.1 mi trail in Eldorado National Forest, California. The figures here are pulled from the official US Forest Service trail data for Eldorado 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. 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. Mountain bikes are allowed, open year-round in the data. 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 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. 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 Mace Mill Loop?
- Yes. Mountain bikes are designated as allowed on Mace Mill Loop in Eldorado National Forest, year-round, per USFS data.
- Are e-bikes allowed on Mace Mill Loop?
- Class 1, Class 2, Class 3 e-bikes are designated on Mace Mill Loop in the USFS data.
- How long is Mace Mill Loop?
- Mace Mill Loop measures about 6.1 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Mace Mill Loop?
- USFS data records the tread surface of Mace Mill Loop as native material.
- How difficult is Mace Mill Loop?
- 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 Eldorado National Forest (USFS trail geometry isn't mapped).
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