USFS National Forest System Trails · California · Updated June 2026
Shasta-Trinity National Forest Mountain Bike Trails
Shasta-Trinity National Forest earns a Bike Access Grade of A: 77% of its rideable trail miles are open to mountain bikes, with Class-1 e-bike access on part of the network. Excellent — most rideable trail miles are open to mountain bikes, with Class-1 e-bike access too.
Shasta-Trinity National Forest carries 1,146 mi of mapped National Forest System trail, of which 164 mi across 61 segments is designated for mountain bikes, typically open Year-round. Class 1 e-bikes are designated on 29 segments (48.2 mi).
What the USFS data shows for Shasta-Trinity National Forest
Of the 1,146 mi of mapped trail in Shasta-Trinity National Forest, 14% — 164 mi across 61 bike-designated segments — is open to mountain bikes in USFS travel-management data.
Tread is overwhelmingly native dirt: USFS lists native material on 698 of 792 surfaced segments (88%).
On the USFS difficulty rating, advanced is the most common designation here — 413 of 776 rated segments (53%) — across all uses, not bikes alone.
USFS records a year-round bike season for this forest, though high-elevation trails clear later in practice.
The longest single named bike segment in the data is Curl Ridge Jeep Trail at 19.7 mi on native dirt, rated advanced by USFS.
Class 1 e-bikes are designated on 29 segments (48.2 mi), and 9 segments carry an ADA-accessibility flag in the same dataset.
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 |
|---|---|---|---|---|
| Curl Ridge Jeep Trail | 19.7 | Native Material | — | — |
| South Fork Trinity River Trail | 16.06 | Native Material | — | Year-round |
| Upper Mccloud River | 15.79 | Native Material | — | Year-round |
| Bagley Mtn | 11.81 | Native Material | — | — |
| Bear Springs | 9.76 | Native Material | — | Year-round |
| Sisson-Callahan Nrt | 8.9 | Native Material | — | Year-round |
| Clikapudi | 8.36 | Native Material | — | Year-round |
| Garden Ridge | 6.82 | Native Material | — | — |
| Gateway | 6.47 | Native Material | — | Year-round |
| Huckleberry Loop | 6.05 | Native Material | — | Year-round |
| East Tule Creek | 5.58 | Native Material | — | Year-round |
| Smoky Creek | 5.32 | Native Material | — | Year-round |
| Muirs Ascension | 5.01 | Native Material | — | Year-round |
| Beegum Creek | 4.68 | Native Material | — | Year-round |
| Dry Fork Creek | 4.65 | Native Material | — | Year-round |
| Rough Gulch | 4.32 | Native Material | — | Year-round |
| Lower South Fork | 3.85 | Native Material | — | Year-round |
| Weaver Basin | 3.84 | Native Material | — | Year-round |
| Cosmic Connector | 3.5 | Native Material | — | Year-round |
| Rays Peak | 3.34 | Native Material | — | Year-round |
| Marble Caves | 3.09 | Native Material | — | Year-round |
| Mckenzie Gulch | 2.91 | Native Material | — | Year-round |
| Bailey Cove | 2.91 | Native Material | — | Year-round |
| Trinity Lakeshore | 2.83 | Native Material | — | Year-round |
| Waters Gulch | 2.75 | Imported Compacted Material | — | Year-round |
Every trail in Shasta-Trinity National Forest
All 54 ridable trails in this forest — every trail where USFS data designates mountain-bike or Class 1 e-bike use, grouped by grade-based steepness. Grade reflects slope, not technical difficulty. Each trail links to its full data profile.
Easy grade (4)
Gentle grade band (shallow average slope).
- Upper Mccloud River15.8 mi · bike
- Bagley Mtn11.8 mi · Class 1 e-bike
- Bailey Cove2.9 mi · bike
- Moon Doggie1.2 mi · bike
Intermediate grade (13)
Moderate grade band.
- Gateway6.5 mi · bike
- Weaver Basin3.8 mi · bike
- Mckenzie Gulch2.9 mi · bike
- Musser Homested2.5 mi · bike
- Jackass Ridge2.2 mi · bike
- Musser Hill1.6 mi · bike
- Lower Jackass Ridge1.2 mi · bike
- Marly0.9 mi · bike
- Stump0.9 mi · bike
- My Trail0.7 mi · bike
- Howe Ditch0.7 mi · bike
- Sydney Gulch0.5 mi · bike
- Tunnel0.5 mi · bike
Advanced grade (19)
Steep grade band.
- Curl Ridge Jeep Trail19.7 mi · Class 1 e-bike
- South Fork Trinity River Trail16.1 mi · bike
- Sisson-Callahan Nrt8.9 mi · bike
- Clikapudi8.4 mi · bike
- East Tule Creek5.6 mi · bike
- Smoky Creek5.3 mi · bike
- Beegum Creek4.7 mi · bike
- Dry Fork Creek4.7 mi · bike
- Rough Gulch4.3 mi · bike
- Lower South Fork3.9 mi · bike
- Rays Peak3.3 mi · bike
- Marble Caves3.1 mi · bike
- Trinity Lakeshore2.8 mi · bike
- Waters Gulch2.8 mi · bike
- Deerlick2.6 mi · Class 1 e-bike
- Snow Gap2 mi · bike
- Dog Gulch1.2 mi · bike
- Clikapudi C1.1 mi · bike
- Packers Fish Loop0.7 mi · bike
Expert grade (6)
Steepest grade band.
- Garden Ridge6.8 mi · Class 1 e-bike
- Dobbins Gulch2 mi · Class 1 e-bike
- Star Mountain Ridge1.2 mi · Class 1 e-bike
- Seven Up1 mi · Class 1 e-bike
- Indian Valley Dispersed0.8 mi · Class 1 e-bike
- Mud Springs0.5 mi · Class 1 e-bike
Grade not recorded (12)
No grade band recorded in the USFS data.
- Bear Springs9.8 mi · bike
- Huckleberry Loop6.1 mi · bike
- Muirs Ascension5 mi · bike
- Cosmic Connector3.5 mi · bike
- Steam Donkey2 mi · bike
- Supernatural Singletrack1.9 mi · bike
- Lemurian Delirium1.7 mi · bike
- Everitt Traverse1.3 mi · bike
- Crags View1.3 mi · bike
- Pyroclasm1.2 mi · bike
- Strawberry Valley1 mi · bike
- Chipmunk1 mi · bike
Shasta-Trinity National Forest bike-legal trail list (CSV)
Download all 54 bike- and Class 1 e-bike-designated trails in Shasta-Trinity National Forest — name, miles, surface, grade, season, and e-bike class per trail, straight from USFS data.
E-bikes in Shasta-Trinity National Forest
Class 1 on 29 segments · Class 2 on 29 · Class 3 on 29. See full e-bike rules for Shasta-Trinity National Forest →
Where it is
Approximate center of Shasta-Trinity National Forest. USFS trail geometry isn't mapped here — use the ranger district for trailheads.
Frequently asked questions
- What is the bike access grade for Shasta-Trinity National Forest?
- Shasta-Trinity National Forest earns a Bike Access Grade of A: 77% of its rideable trail miles are open to mountain bikes, with Class-1 e-bike access on part of the network. Excellent — most rideable trail miles are open to mountain bikes, with Class-1 e-bike access too.
- 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 61 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 29 segments. See the e-bike rules page for the class-by-class breakdown.
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