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USFS National Forest System Trails · Montana · Updated June 2026

Flathead National Forest Mountain Bike Trails

CBike Access Grade C27% of rideable miles open to bikes. How we grade

Flathead National Forest earns a Bike Access Grade of C: 27% of its rideable trail miles are open to mountain bikes, with Class-1 e-bike access on part of the network. Mixed — bikes are open on a meaningful share of rideable trails, but many are e-bike-only or discouraged.

Flathead National Forest carries 2,260 mi of mapped National Forest System trail, of which 79.6 mi across 27 segments is designated for mountain bikes, typically open May–Oct. Class 1 e-bikes are designated on 67 segments (235 mi).

What the USFS data shows for Flathead National Forest

Of the 2,260 mi of mapped trail in Flathead National Forest, 4% — 79.6 mi across 27 bike-designated segments — is open to mountain bikes in USFS travel-management data.

Tread is overwhelmingly native dirt: USFS lists native material on 810 of 883 surfaced segments (92%).

On the USFS difficulty rating, advanced is the most common designation here — 682 of 876 rated segments (78%) — across all uses, not bikes alone.

The headline bike season runs May–Oct; individual segments vary, with 5 distinct season windows recorded across the sampled bike trails.

The longest single named bike segment in the data is Alpine 7 at 55.25 mi on native dirt, rated advanced by USFS.

Class 1 e-bikes are designated on 67 segments (235 mi), and 6 segments carry an ADA-accessibility flag in the same dataset.

C
Bike Access Grade
27% of rideable miles bike-open
67
Ridable trails
with their own page
79.6 mi
Bike-designated
27 segments
2,260 mi
Total NFS trail
888 segments
235 mi
Class 1 e-bike
67 segments

Trail surface

  • Native Material810
  • Snow65
  • Imported Compacted Material8

USFS trail class (1 = primitive · 5 = developed)

  • Class 3494
  • Class 2298
  • Class 469
  • Class 123

4% 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

TrailMilesSurfaceTrail classBike season
Alpine 755.25Native Material
Tally- Ashley19.59Native Material
Columbia Mtn. Loop12.06Native Material
Ingalls - Mt Conner10.01Native Material
Jimmie Ridge8.42Native Material
Foys To Blacktail7.39Native MaterialYear-round
Wire Trail6.89Native Material
Beardance6.82Native MaterialYear-round
Elk Mtn.6.79Native MaterialJun–Oct
Peterson Creek6.03Native Material
Ashley Divide5.84Native Material
Wild Bill - Truman Creek5.78Native Material
Wild Bill - Eagle Mtn. Trail5.76Native Material
Pine Grass5.58Unknown
Summit5.58Native MaterialJun–Sep
South Fork Hemler Creek5.56Native Material
Ashley Mtn5.54Native Material
Abbot Creek4.74UnknownMay–Oct
Sixmile Lookout4.44Native Material
Skyland4.23Native Material
Upper Dayton Creek Ohv4.19Native Material
Johnson Peak4.17Native MaterialJun–Oct
Lupine Lake3.95Native MaterialJun–Nov
Holbrook Trail3.95UnknownYear-round
Phillips3.94Native MaterialYear-round

Every trail in Flathead National Forest

All 67 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 (12)

Gentle grade band (shallow average slope).

Intermediate grade (19)

Moderate grade band.

Advanced grade (29)

Steep grade band.

Expert grade (1)

Steepest grade band.

Grade not recorded (6)

No grade band recorded in the USFS data.

CSV

Flathead National Forest bike-legal trail list (CSV)

Download all 67 bike- and Class 1 e-bike-designated trails in Flathead National Forest — name, miles, surface, grade, season, and e-bike class per trail, straight from USFS data.

E-bikes in Flathead National Forest

Class 1 on 67 segments · Class 2 on 67 · Class 3 on 67. See full e-bike rules for Flathead National Forest

Where it is

Approximate center of Flathead 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 Flathead National Forest?
Flathead National Forest earns a Bike Access Grade of C: 27% of its rideable trail miles are open to mountain bikes, with Class-1 e-bike access on part of the network. Mixed — bikes are open on a meaningful share of rideable trails, but many are e-bike-only or discouraged.
How many miles of mountain bike trail are in Flathead National Forest?
Flathead National Forest has about 79.6 mi of bike-designated trail across 27 segments, out of 2,260 mi of total National Forest System trail.
What is the riding season in Flathead National Forest?
Most bike-designated trails in Flathead National Forest carry a May–Oct season in USFS data; higher-elevation trails clear later.
Are e-bikes allowed in Flathead National Forest?
Only where designated. Class 1 e-bikes are recorded on 67 segments. See the e-bike rules page for the class-by-class breakdown.

Where to stay near Flathead National Forest

Cabins, lodges, and campgrounds near Flathead National Forest in Montana — compare places to stay for a mountain-bike trip.

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