USFS National Forest System Trails · White Mountain National Forest · New Hampshire · Updated June 2026
Primary 156 (USFS trail 97564) is a 4.5 mi trail in White Mountain National Forest, New Hampshire. Mountain-bike use here is not designated in USFS data, with Class 1 e-bikes also designated.
Can I bike Primary 156?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | — | |
| Class 1 e-bike (pedal-assist, 20 mph) | Allowed | Jan–Apr, Nov–Dec |
| Class 2 e-bike (throttle, 20 mph) | Allowed | Jan–Apr, Nov–Dec |
| Class 3 e-bike (pedal-assist, 28 mph) | Allowed | Jan–Apr, Nov–Dec |
Zooming out: across White Mountain National Forest, 19% of rideable trail miles are open to mountain bikes — a Bike Access Grade of D.
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About this trail
Primary 156 (USFS trail 97564) is a 4.5 mi trail in White Mountain National Forest, New Hampshire. The figures here are pulled from the official US Forest Service trail data for White Mountain National Forest, covering the trail's mileage, tread, grade band, and the bike and e-bike uses the agency lists as designated. USFS records list its surface as snow. No grade band is recorded, so a steepness-based difficulty isn't available for this trail. Note that mountain-bike use here is not designated in USFS records — confirm with the ranger district before riding. On the electric side, Class 1, Class 2, Class 3 e-bikes are also designated (Jan–Apr, Nov–Dec) — 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 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 White Mountain National Forest.
Frequently asked questions
- Can you mountain bike on Primary 156?
- Mountain-bike use on Primary 156 is not designated in USFS records, though Class 1 e-bike use is designated. Confirm current rules with the managing ranger district.
- Are e-bikes allowed on Primary 156?
- Class 1, Class 2, Class 3 e-bikes are designated on Primary 156 in the USFS data.
- How long is Primary 156?
- Primary 156 measures about 4.5 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Primary 156?
- USFS data records the tread surface of Primary 156 as snow.
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 White Mountain National Forest (USFS trail geometry isn't mapped).
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