USFS National Forest System Trails · California · Updated June 2026
Eldorado National Forest Mountain Bike Trails
Eldorado National Forest carries 845 mi of mapped National Forest System trail, of which 377 mi across 341 segments is designated for mountain bikes, typically open Year-round. Class 1 e-bikes are designated on 262 segments (277 mi).
377 mi
Bike-designated
341 segments
845 mi
Total NFS trail
627 segments
277 mi
Class 1 e-bike
262 segments
19
ADA-accessible
trail segments
Trail surface
- Native Material534
- Snow72
- Ac- Asphalt17
- Imported Compacted Material3
- Other1
USFS trail class (1 = primitive · 5 = developed)
- Class 3422
- Class 2137
- Class 436
- Class 518
- Class 114
45% 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 |
|---|---|---|---|---|
| Caldor Loop | 5.21 | Native Material | 3 | Year-round |
| Pony Express | 4.07 | Native Material | 3 | Year-round |
| Big X Atv | 3.69 | Native Material | 3 | — |
| Pony Express | 2.93 | Native Material | 3 | Year-round |
| Union Valley Bike Trail | 2.89 | Ac- Asphalt | 5 | Year-round |
| Big Brushy | 2.87 | Native Material | 3 | — |
| Big Mtn. Loop | 2.81 | Native Material | 3 | Year-round |
| Pony Express | 2.73 | Native Material | 3 | Year-round |
| Pony Express | 2.68 | Native Material | 3 | Year-round |
| West Bald Mountain | 2.53 | Native Material | 3 | Year-round |
| Pony Express | 2.45 | Native Material | 3 | Year-round |
| Al Brass | 2.42 | Native Material | 3 | Year-round |
| Caldor Loop | 2.33 | Native Material | 3 | Year-round |
| Elkins Gold | 2.11 | Native Material | 3 | Year-round |
| Crosier Run | 2.03 | Native Material | 3 | Year-round |
| Rock Creek Loop | 1.89 | Native Material | 3 | Year-round |
| Elkins Gold | 1.84 | Native Material | 3 | Year-round |
| Big Mtn. Loop | 1.84 | Native Material | 3 | Year-round |
| Darling Ridge Loop | 1.75 | Native Material | 3 | Year-round |
| Crosier Cutoff | 1.73 | Native Material | 3 | Year-round |
| Rock Creek Loop | 1.42 | Native Material | 3 | Year-round |
| Bluebird | 1.41 | Native Material | 3 | Year-round |
| Rock Creek Loop | 1.32 | Native Material | 3 | Year-round |
| Pony Express | 1.28 | Native Material | 3 | Year-round |
| Pony Express | 1.25 | Native Material | 3 | Year-round |
E-bikes in Eldorado National Forest
Class 1 on 262 segments · Class 2 on 262 · Class 3 on 262. See full e-bike rules for Eldorado National Forest →
Frequently asked questions
- How many miles of mountain bike trail are in Eldorado National Forest?
- Eldorado National Forest has about 377 mi of bike-designated trail across 341 segments, out of 845 mi of total National Forest System trail.
- What is the riding season in Eldorado National Forest?
- Most bike-designated trails in Eldorado National Forest carry a Year-round season in USFS data; higher-elevation trails clear later.
- Are e-bikes allowed in Eldorado National Forest?
- Only where designated. Class 1 e-bikes are recorded on 262 segments. See the e-bike rules page for the class-by-class breakdown.