USFS National Forest System Trails · Allegheny National Forest · Pennsylvania · Updated June 2026
Marienville Atv Loop B (USFS trail 85133B) is a 1 mi trail in Allegheny National Forest, Pennsylvania. Mountain bikes are designated as allowed year-round, with Class 1 e-bikes also designated.
Can I bike Marienville Atv Loop B?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | year-round |
| Class 1 e-bike (pedal-assist, 20 mph) | Allowed | Jan–Sep, December |
| Class 2 e-bike (throttle, 20 mph) | Allowed | Jan–Sep, December |
| Class 3 e-bike (pedal-assist, 28 mph) | Allowed | Jan–Sep, December |
Zooming out: across Allegheny National Forest, 81% of rideable trail miles are open to mountain bikes — a Bike Access Grade of A.
Watch Allegheny National Forest for access changes
Email me when USFS mountain-bike or e-bike designations change for trails in Allegheny National Forest. Free, unsubscribe anytime.
About this trail
Marienville Atv Loop B (USFS trail 85133B) runs 1 mi through Allegheny National Forest in Pennsylvania. Everything below comes straight from the US Forest Service National Forest System Trails dataset — length, surface, slope-derived difficulty, and the specific bike and e-bike designations on record — so you can check legality before you load up. The tread is mapped as imported compacted material. No grade band is recorded, so a steepness-based difficulty isn't available for this trail. Mountain bikes are allowed, open year-round in the data. The record additionally permits Class 1, Class 2, Class 3 e-bike use, Jan–Sep, December; 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. 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 Marienville Atv Loop B?
- Yes. Mountain bikes are designated as allowed on Marienville Atv Loop B in Allegheny National Forest, year-round, per USFS data.
- Are e-bikes allowed on Marienville Atv Loop B?
- Class 1, Class 2, Class 3 e-bikes are designated on Marienville Atv Loop B in the USFS data.
- How long is Marienville Atv Loop B?
- Marienville Atv Loop B measures about 1 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Marienville Atv Loop B?
- USFS data records the tread surface of Marienville Atv Loop B as imported compacted material.
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 Allegheny National Forest (USFS trail geometry isn't mapped).
Where to stay near Allegheny National Forest
Find hotels, cabins, and vacation rentals near Allegheny National Forest — plan your ride.
Top-rated places to stay near Allegheny National Forest
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Riding Allegheny National Forest?
Trail-access updates and trip ideas by email.