USFS National Forest System Trails · California · Updated June 2026
Shasta-Trinity National Forest Mountain Bike Trails
Shasta-Trinity National Forest carries 1,146 mi of mapped National Forest System trail, of which 164 mi across 102 segments is designated for mountain bikes, typically open Year-round. Class 1 e-bikes are designated on 38 segments (48.2 mi).
164 mi
Bike-designated
102 segments
1,146 mi
Total NFS trail
793 segments
48.2 mi
Class 1 e-bike
38 segments
11
ADA-accessible
trail segments
Trail surface
- Native Material698
- Imported Compacted Material58
- Asphalt20
- Snow9
- Other2
USFS trail class (1 = primitive · 5 = developed)
- Class 3506
- Class 4160
- Class 274
- Class 123
- Class 523
14% 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 |
|---|---|---|---|---|
| Upper Mccloud River | 14.27 | Native Material | 4 | Year-round |
| Bear Springs | 9.76 | Native Material | 3 | Year-round |
| Sisson-Callahan Nrt | 6.6 | Native Material | 4 | Year-round |
| Gateway | 6.47 | Native Material | 4 | Year-round |
| Huckleberry Loop | 6.05 | Native Material | — | Year-round |
| East Tule Creek | 5.58 | Native Material | 4 | Year-round |
| Smoky Creek | 5.32 | Native Material | 4 | Year-round |
| Muirs Ascension | 5.01 | Native Material | 3 | Year-round |
| South Fork Trinity River Trail | 4.96 | Native Material | 3 | Year-round |
| Beegum Creek | 4.68 | Native Material | 4 | Year-round |
| Dry Fork Creek | 4.65 | Native Material | 4 | Year-round |
| Rough Gulch | 4.32 | Native Material | 1 | Year-round |
| South Fork Trinity River Trail | 4.21 | Native Material | 3 | Year-round |
| Lower South Fork | 3.85 | Native Material | 3 | Year-round |
| Weaver Basin | 3.84 | Native Material | 3 | Year-round |
| Cosmic Connector | 3.5 | Native Material | — | Year-round |
| Rays Peak | 3.34 | Native Material | 3 | Year-round |
| South Fork Trinity River Trail | 3.15 | Native Material | 3 | Year-round |
| Marble Caves | 3.09 | Native Material | 2 | Year-round |
| Trinity Lakeshore | 2.83 | Native Material | 3 | Year-round |
| Clikapudi | 2.79 | Native Material | 4 | Year-round |
| Waters Gulch | 2.67 | Native Material | 4 | Year-round |
| Musser Homested | 2.54 | Native Material | 3 | Year-round |
| Clikapudi | 2.36 | Native Material | 4 | Year-round |
| Jackass Ridge | 2.24 | Native Material | 3 | Year-round |
E-bikes in Shasta-Trinity National Forest
Class 1 on 38 segments · Class 2 on 38 · Class 3 on 38. See full e-bike rules for Shasta-Trinity National Forest →
Frequently asked questions
- How many miles of mountain bike trail are in Shasta-Trinity National Forest?
- Shasta-Trinity National Forest has about 164 mi of bike-designated trail across 102 segments, out of 1,146 mi of total National Forest System trail.
- What is the riding season in Shasta-Trinity National Forest?
- Most bike-designated trails in Shasta-Trinity National Forest carry a Year-round season in USFS data; higher-elevation trails clear later.
- Are e-bikes allowed in Shasta-Trinity National Forest?
- Only where designated. Class 1 e-bikes are recorded on 38 segments. See the e-bike rules page for the class-by-class breakdown.