USFS National Forest System Trails · Prescott National Forest · Arizona · Updated June 2026
Nemo Spring (USFS trail 9405) is a 5.4 mi trail in Prescott National Forest, Arizona. Mountain-bike use here is accepted but discouraged in USFS data, with Class 1 e-bikes also designated.
Can I bike Nemo Spring?
| 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 |
Zooming out: across Prescott National Forest, 85% of rideable trail miles are open to mountain bikes — a Bike Access Grade of A.
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About this trail
Nemo Spring (USFS trail 9405) is a 5.4 mi trail in Prescott National Forest, Arizona. 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. Underfoot, the trail is recorded as native material. Its grade-based difficulty is Intermediate (grade band 10-12%) — a moderate steepness profile derived from USFS slope data, not a technical mountain-bike rating. For traditional mountain bikes, use is discouraged according to USFS data. 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 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 Prescott National Forest.
Frequently asked questions
- Can you mountain bike on Nemo Spring?
- Mountain-bike use on Nemo Spring 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 Nemo Spring?
- Class 1, Class 2, Class 3 e-bikes are designated on Nemo Spring in the USFS data.
- How long is Nemo Spring?
- Nemo Spring measures about 5.4 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Nemo Spring?
- USFS data records the tread surface of Nemo Spring as native material.
- How difficult is Nemo Spring?
- Its grade-based difficulty is Intermediate (grade band 10-12%), 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 Prescott National Forest (USFS trail geometry isn't mapped).
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