USFS National Forest System Trails · Montana · Updated June 2026
Helena-Lewis and Clark National Forest Mountain Bike Trails
Helena-Lewis and Clark National Forest carries 3,588 mi of mapped National Forest System trail, of which 1,684 mi across 960 segments is designated for mountain bikes, typically open Year-round. Class 1 e-bikes are designated on 555 segments (891 mi).
1,684 mi
Bike-designated
960 segments
3,588 mi
Total NFS trail
1,626 segments
891 mi
Class 1 e-bike
555 segments
13
ADA-accessible
trail segments
Trail surface
- Native Material1,404
- Snow203
- Imported Compacted Material6
- Imported Loose Material3
- Asphalt3
USFS trail class (1 = primitive · 5 = developed)
- Class 3723
- Class 2712
- Class 4109
- Class 178
- Class 53
47% of this forest's mapped trail is bike-designated. Note: USFS records trail grade (steepness), not technical MTB difficulty — we surface grade where present but do not infer a black/blue/green rating from it.
Largest bike-designated trails
| Trail | Miles | Surface | Trail class | Bike season |
|---|---|---|---|---|
| Mt High Jeep | 13.58 | Native Material | 2 | Year-round |
| Summit Jeep | 7.43 | Native Material | 2 | Year-round |
| High Springs | 6.44 | Native Material | 3 | Year-round |
| High Roller | 5.79 | Native Material | 3 | Year-round |
| Bluff Mtn Jeep | 5.73 | Native Material | 2 | Year-round |
| Brooklyn Bridge | 5.64 | Native Material | 3 | Year-round |
| Treasure Mt 1 | 4.98 | Native Material | 3 | Year-round |
| Whetstone Connector | 4.96 | Native Material | 1 | Year-round |
| Jellison Haymaker Jeep | 4.66 | Native Material | 2 | Year-round |
| Low Flow | 4.56 | Native Material | 3 | Year-round |
| Cow Creek | 3.84 | Native Material | 2 | Year-round |
| Jerusha Gulch | 3.69 | Native Material | 3 | Year-round |
| Oti Creek/N. Fork Hoover | 3.62 | Native Material | 3 | Year-round |
| N. Fork Deadman | 3.5 | Native Material | 2 | Year-round |
| Forest Lake | 3.17 | Native Material | 3 | Year-round |
| Lower Russian Loop | 2.74 | Native Material | 2 | Year-round |
| North Fork Highwood Creek | 2.67 | Native Material | 3 | Year-round |
| Baldy Ridge | 2.55 | Native Material | 3 | Year-round |
| Little Camas Creek | 2.49 | Native Material | 4 | Year-round |
| Belt Ridge Jeep | 2.39 | Native Material | 2 | Year-round |
| Chamberlain-Pioneer Connector | 2.14 | Native Material | 2 | Year-round |
| Roberts Creek Jeep | 2.04 | Native Material | 2 | Year-round |
| Quartzite Ridge | 2.01 | Native Material | 2 | Year-round |
| Daisy Atv | 1.92 | Native Material | 3 | Year-round |
| Rooster Bill | 1.89 | Native Material | 3 | Year-round |
E-bikes in Helena-Lewis and Clark National Forest
Class 1 on 555 segments · Class 2 on 555 · Class 3 on 555. See full e-bike rules for Helena-Lewis and Clark National Forest →
Frequently asked questions
- How many miles of mountain bike trail are in Helena-Lewis and Clark National Forest?
- Helena-Lewis and Clark National Forest has about 1,684 mi of bike-designated trail across 960 segments, out of 3,588 mi of total National Forest System trail.
- What is the riding season in Helena-Lewis and Clark National Forest?
- Most bike-designated trails in Helena-Lewis and Clark National Forest carry a Year-round season in USFS data; higher-elevation trails clear later.
- Are e-bikes allowed in Helena-Lewis and Clark National Forest?
- Only where designated. Class 1 e-bikes are recorded on 555 segments. See the e-bike rules page for the class-by-class breakdown.