USFS National Forest System Trails · Custer Gallatin National Forest · Montana · Updated June 2026
4432d (USFS trail 4432D) is a 1.8 mi trail in Custer Gallatin National Forest, Montana. Mountain bikes are designated as allowed year-round, with Class 1 e-bikes also designated.
Can I bike 4432d?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | year-round |
| 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 Custer Gallatin National Forest, 98% of rideable trail miles are open to mountain bikes — a Bike Access Grade of A.
Watch Custer Gallatin National Forest for access changes
Email me when USFS mountain-bike or e-bike designations change for trails in Custer Gallatin National Forest. Free, unsubscribe anytime.
About this trail
4432d (USFS trail 4432D) runs 1.8 mi through Custer Gallatin National Forest in Montana. The figures here are pulled from the official US Forest Service trail data for Custer Gallatin National Forest, covering the trail's mileage, tread, grade band, and the bike and e-bike uses the agency lists as designated. The tread is mapped as native material. USFS slope data puts it in the Intermediate band (grade band +8-10%), meaning a moderate climb — keep in mind this measures steepness, not trail technicality. Mountain bikes are allowed, open year-round in the data. The record additionally permits Class 1, Class 2, Class 3 e-bike use; 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 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 Custer Gallatin National Forest.
Frequently asked questions
- Can you mountain bike on 4432d?
- Yes. Mountain bikes are designated as allowed on 4432d in Custer Gallatin National Forest, year-round, per USFS data.
- Are e-bikes allowed on 4432d?
- Class 1, Class 2, Class 3 e-bikes are designated on 4432d in the USFS data.
- How long is 4432d?
- 4432d measures about 1.8 mi in total, summed across its mapped National Forest System segments.
- What is the surface of 4432d?
- USFS data records the tread surface of 4432d as native material.
- How difficult is 4432d?
- Its grade-based difficulty is Intermediate (grade band +8-10%), 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 Custer Gallatin National Forest (USFS trail geometry isn't mapped).
Where to stay near Custer Gallatin National Forest
Find hotels, cabins, and vacation rentals near Custer Gallatin National Forest — plan your ride.
Top-rated places to stay near Custer Gallatin 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 Custer Gallatin National Forest?
Trail-access updates and trip ideas by email.
More trails in Custer Gallatin National Forest
14.9 mi · Intermediate grade
11.9 mi · Intermediate grade
10.1 mi · Intermediate grade
8.9 mi · Intermediate grade
8.9 mi · Intermediate grade
8.8 mi · Intermediate grade