USFS National Forest System Trails · Coronado National Forest · Arizona · Updated June 2026
Lower Miller Canyon (USFS trail 172) is a 1.9 mi trail in Coronado National Forest, Arizona. Mountain bikes are designated as allowed year-round, with no Class 1 e-bike designation on record.
Can I bike Lower Miller Canyon?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | year-round |
| Class 1 e-bike (pedal-assist, 20 mph) | — | |
| Class 2 e-bike (throttle, 20 mph) | — | |
| Class 3 e-bike (pedal-assist, 28 mph) | — |
Zooming out: across Coronado National Forest, 84% of rideable trail miles are open to mountain bikes — a Bike Access Grade of A.
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About this trail
In Coronado National Forest, Arizona, Lower Miller Canyon (USFS trail 172) covers 1.9 mi of National Forest System trail. The figures here are pulled from the official US Forest Service trail data for Coronado National Forest, covering the trail's mileage, tread, grade band, and the bike and e-bike uses the agency lists as designated. Underfoot, the trail is recorded 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. Mountain bikes are allowed, open year-round in the data. No e-bike class (1, 2 or 3) is designated on this trail in the USFS data, so treat it as a non-motorized route unless a posted order says otherwise. 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 Lower Miller Canyon?
- Yes. Mountain bikes are designated as allowed on Lower Miller Canyon in Coronado National Forest, year-round, per USFS data.
- Are e-bikes allowed on Lower Miller Canyon?
- No e-bike class (1, 2 or 3) is designated on Lower Miller Canyon in the USFS data.
- How long is Lower Miller Canyon?
- Lower Miller Canyon measures about 1.9 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Lower Miller Canyon?
- USFS data records the tread surface of Lower Miller Canyon as native material.
- How difficult is Lower Miller Canyon?
- 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 Coronado National Forest (USFS trail geometry isn't mapped).
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