USFS National Forest System Trails · Arapaho and Roosevelt National Forests · Colorado · Updated June 2026
Aqueduct Spur (USFS trail 855.1A) is a 0.6 mi trail in Arapaho and Roosevelt National Forests, Colorado. Mountain bikes are designated as allowed year-round, with no Class 1 e-bike designation on record.
Can I bike Aqueduct Spur?
| 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 Arapaho and Roosevelt National Forests, 99% of rideable trail miles are open to mountain bikes — a Bike Access Grade of A.
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About this trail
Aqueduct Spur (USFS trail 855.1A) is a 0.6 mi trail in Arapaho and Roosevelt National Forests, 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. The tread is mapped as native material. Based on slope, this is a Easy trail (grade band +5-8%); that reflects gentle 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. 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 Arapaho and Roosevelt National Forests.
Frequently asked questions
- Can you mountain bike on Aqueduct Spur?
- Yes. Mountain bikes are designated as allowed on Aqueduct Spur in Arapaho and Roosevelt National Forests, year-round, per USFS data.
- Are e-bikes allowed on Aqueduct Spur?
- No e-bike class (1, 2 or 3) is designated on Aqueduct Spur in the USFS data.
- How long is Aqueduct Spur?
- Aqueduct Spur measures about 0.6 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Aqueduct Spur?
- USFS data records the tread surface of Aqueduct Spur as native material.
- How difficult is Aqueduct Spur?
- 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 Arapaho and Roosevelt National Forests (USFS trail geometry isn't mapped).
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