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113 Trails in Boulder County, Colorado

Trail Name	Length (mi)	City
Sundance Trail	6.0	Berthoud
Round Mountain Summit Adventure Trail	9.0	Loveland
Virginia Canyon Mountain Park	11	Idaho Springs
CR 81 To Rendezvous	3.0	Winter Park
Crosier Mountain	10.0	Drake
Lion Gulch	6.0	Pinewood Springs
Red Rocks / Dakota Ridge	6.0	Denver
Warren Gulch	17.0	Idaho Springs
Strawberry / Doe Creek	22.0	Winter Park
Coulson Gulch	9.0	Pinewood Springs
South Saint Vrain	10.0	Ward
Buchanan Pass	10.0	Ward
Mountain Lion Trail (Golden Gate Canyon State Park)	8.0	Black Hawk
Waldrop Trail	3.0	Ward
Sunset West	3	Erie
Maryland Mountain	12	Black Hawk
White Ranch	14.0	Golden
Trestle Bike Park	25.0	Fraser
Rattlesnake Gulch	4.0	Boulder
Golden Gate Canyon State Park	35.0	Golden
Granby Ranch Bike Park	20.0	Granby
Horsetooth Mountain Park	30	Fort Collins
Chimney Gulch	10.0	Golden
Walker Ranch	7.0	Boulder
Hall Ranch	9.0	Lyons
Idlewild Trail System	10	Winter Park
Kruger Rock / Limber Pine Loop	6.0	Estes Park
Apex Park	8	Golden
Silver Creek Trail	5.0	Georgetown
Saxon Mountain	12.0	Georgetown
Sunset Park	1.0	Lakewood
Floyd Hill Open Space	6	Evergreen
Coyote Ridge	7.0	Fort Collins
Valmont Bike Park	6.0	Boulder
Sourdough Trail	12.0	Ward
Devil's Backbone	8	Loveland
Wapiti Trail (Heil Valley Ranch)	5.0	Boulder
Heil Valley Ranch	14.0	Boulder
Ceran Saint Vrain Loop	5.0	Jamestown
Waterline	3.0	Idaho Springs
Barbour Fork Loop	8.0	Idaho Springs
James Peak	27.0	Winter Park
Pole Hill	6.0	Estes Park
Creekside / Flume Loop	5.0	Fraser
Ponderosa Loop (Heil Valley Ranch)	3.0	Boulder
Picture Rock Trail (Heil Valley Ranch)	11.0	Lyons
Silverdale	2.0	Georgetown
Bobcat Ridge	4.0	Masonville
Green World (Trestle Bike Park)	7.0	Winter Park
Blue Sky	15.0	Fort Collins

Know of a new mountain bike trail not listed here? Please tell us about it using this form. Find mountain bike trails near you or for even more trail inspiration and how we ranked the mountain bike trails, see this list of the best mountain bike trails in the world.

Latest Colorado Mountain Bike News

A panoramic view of a dry, hilly landscape with a winding river at the base. In the distance, a small town is visible, along with green trees and open fields. Dark storm clouds gather in the sky above the mountains, creating a dramatic backdrop. A water tower can be seen on the horizon, indicating human presence in the area.

Colorado

An all-new bike park with gravity-style trails is coming to Montrose, CO

The city of Montrose, Colorado is planning a brand-new bike park in the center of town filled with gravity-style trails.

A dirt bike park featuring a series of dirt jumps and mounds, set against a backdrop of rocky hills and a clear blue sky. A paved path is visible on the right side, alongside a fenced area, and a piece of construction equipment can be seen in the distance. The landscape is dry and sandy, characteristic of an outdoor recreational area.

Colorado

A $225,000 revamp of the Lunch Loops Bike Park is currently underway

The bike park at the Lunch Loops Trailhead will soon boast all-new beginner and intermediate-friendly jump lines.

A cyclist riding along a dirt trail surrounded by autumn foliage, with vibrant yellow and orange leaves on the trees. The scene is set in a forest with a mix of coniferous and deciduous trees under a partly cloudy sky.

Colorado

Breckenridge hopes to address user conflict by designating the popular Aspen Alley multi-use trail as mountain-bike- and DH-only

Breckenridge hopes to convert the crowded Aspen Alley trail to downhill-only for mountain bikers while building a new, parallel multi-use trail.

Brown sign with a red stop symbol, indicating that bikes are prohibited on Canyon Loop Trail on Wednesdays and Saturdays, set against a backdrop of green trees and rolling hills.

Colorado

Boulder County, Colorado mountain bikers restricted trail access under pilot program

Boulder County, Colorado proposes testing alternating trail use schedules at select parks, prompting concerns from mountain bikers about reduced access to an already-limited set of trails.

A scenic view of a mountainous landscape in autumn, featuring vibrant yellow and green trees in the foreground. In the background, steep mountains are partially covered by clouds under a blue sky. A cluster of houses with dark roofs is nestled among the trees, complementing the natural beauty of the surroundings.

Colorado

Telluride closes downhill bike park for 2026 following longest ski patrol strike in US history

After a winter shutdown driven by the longest pro ski patrol strike in U.S. history, Telski says a Lift 4 upgrade will keep the bike park closed all summer — but locals aren't buying the official explanation.

A scenic view of a mountain trail winding along a grassy hillside, surrounded by lush forests and distant peaks under a bright blue sky with wispy clouds. The path leads through a vibrant green landscape, showcasing the natural beauty of the mountainous terrain.

Colorado

The Monarch Crest Trail's doubletrack downhill is being replaced with 1.8 miles of singletrack

After years of losing precious vert on a dusty mining road, riders will soon have a purpose-built singletrack descent wrapping around the flanks of Mount Ouray.

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Boulder County Mountain Bike Trails

113 Trails in Boulder County, Colorado

Boulder County, Colorado Local info

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