USFS National Forest System Trails · Arapaho and Roosevelt National Forests · Colorado · Updated June 2026
Blizzard Pass (USFS trail 121) is a 1.9 mi trail in Arapaho and Roosevelt National Forests, Colorado. Mountain bikes are designated as allowed, Jun–Nov, with Class 1 e-bikes also designated.
Can I bike Blizzard Pass?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | Jun–Nov |
| Class 1 e-bike (pedal-assist, 20 mph) | Allowed | Jun–Nov |
| Class 2 e-bike (throttle, 20 mph) | Allowed | Jun–Nov |
| Class 3 e-bike (pedal-assist, 28 mph) | Allowed | Jun–Nov |
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
In Arapaho and Roosevelt National Forests, Colorado, Blizzard Pass (USFS trail 121) covers 1.9 mi of National Forest System trail. 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. 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. Bike use is designated as allowed, typically Jun–Nov. The record additionally permits Class 1, Class 2, Class 3 e-bike use, Jun–Nov; 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. 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 Blizzard Pass?
- Yes. Mountain bikes are designated as allowed on Blizzard Pass in Arapaho and Roosevelt National Forests, typically Jun–Nov, per USFS data.
- Are e-bikes allowed on Blizzard Pass?
- Class 1, Class 2, Class 3 e-bikes are designated on Blizzard Pass in the USFS data.
- How long is Blizzard Pass?
- Blizzard Pass measures about 1.9 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Blizzard Pass?
- USFS data records the tread surface of Blizzard Pass as native material.
- How difficult is Blizzard Pass?
- 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 Arapaho and Roosevelt National Forests (USFS trail geometry isn't mapped).
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