4.6
(86)
3,629
riders
213
rides
Mountain biking in Boulder County offers access to over 45,000 acres of conserved open space, characterized by diverse landscapes. The region features iconic red rock formations like the Flatirons, alongside extensive trail networks that traverse plains, canyons, and forested areas. Boulder Creek flows through the area, and geological diversity includes sandstone spires and varied terrain suitable for mountain biking.
Last updated: April 25, 2026
4.8
(6)
230
riders
29.0km
02:35
330m
330m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
2.6
(5)
216
riders
14.6km
01:36
420m
420m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.

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4.6
(7)
214
riders
18.6km
01:47
440m
440m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
4.8
(5)
206
riders
24.9km
02:11
260m
260m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
4.3
(4)
169
riders
22.0km
02:03
310m
310m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
4.0
(2)
103
riders
12.6km
01:27
420m
420m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
5.0
(1)
75
riders
15.6km
01:37
370m
370m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
4.0
(5)
19
riders
52.0km
05:07
1,190m
1,190m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
15
riders
4.03km
00:23
60m
60m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
5.0
(1)
12
riders
29.0km
03:01
700m
700m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
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Popular around Boulder County
The Spring Brook Loop is a great introduction to mountain biking in Colorado’s Front Range, offering a mix of technical challenges and awesome views. The trail features a series of rocky step-ups, rolling singletrack, and winding paths through forests. The ride is mostly sun-exposed, so pacing water is important, and the trail is shared and popular with hikers, runners, and other bikers. Highlights include the descent through Doudy Draw and the twisty, wooded sections of the Spring Brook Loop. The trail loops back, offering expansive views of the Flatirons before returning to the starting point.
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The Greenbelt Plateau Trail starts at a trailhead off Highway 93 and Highway 128 and offers an easy singletrack ride perfect for novice riders. It connects with the Greenbelt Connector, allowing riders to access the western part of the Marshall Mesa trail system. On the northern end, the trail splits; staying west leads to the Community Ditch Trail near Highway 93. This section is also a safe route north without having to ride along the busy Highway 93.
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The Community Ditch Trail is an easy mountain biking route that serves as a connector to the Marshall Mesa trails. While not particularly thrilling to ride, it offers beautiful views of the Flatirons and golden open fields. The trail effectively connects the east and west sections of trails across Highway 93, making it useful, scenic, and straightforward.
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Really an old dirt road, this trail makes a great connector between the other trails in the area of Marshall Lake. Watch out for fast-moving mountain bikers!
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The Hall Ranch Trailhead is the main access point for the popular Hall Ranch Open Space. There are over fifty parking spots across two lots, restrooms, picnic tables, a 50 person group shelter, and three horse trailer spots. Hall Ranch itself is a beautiful open space with rolling grasslands, sandstone buttes, and several popular trails for runners, hikers, and mountain bikers.
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Overland Loop Trail is a smooth flowy cross-country trail that weaves through and around pine trees with little tech. This is an ideal place for new riders.
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Hobbit Trail is one of the original trails in West Mag system. It goes through clear cut meadows with great views of the Indian Peaks and the peaks of Rocky Mountain National Park.
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Boulder County offers a vast network of mountain bike trails, with over 200 routes available on komoot. These trails cover more than 100 miles and cater to a wide range of abilities, from beginner-friendly paths to technical singletrack.
The prime season for mountain biking in Boulder County typically runs from March through November. However, some trails, such as those at Marshall Mesa and Walker Ranch, can be accessible during warmer winter spells, offering year-round opportunities.
Yes, Boulder County has many options for beginners and families. Trails like those at Marshall Mesa offer gradual ups and downs across open plains, making them suitable for various skill levels. The Overland Loop Trail is another easy option, with minimal elevation change. For very smooth, beginner-friendly singletrack, consider the Erie Singletrack area.
For more advanced riders seeking a challenge, Boulder County offers several difficult routes. The Betasso Preserve: Canyon and Benjamin Loops features fast, low-tech singletrack. The Hall Ranch Loop and Heil, Hall, and Picture Rock Loop also provide significant elevation gain and technical terrain.
Yes, many mountain bike trails in Boulder County are designed as loops, offering a continuous riding experience. Popular loop options include the Marshall Mesa Loop, Walker Ranch Loop, and the Betasso Preserve: Canyon and Benjamin Loops.
Boulder County's trails offer diverse scenery, from open plains to forested areas and dramatic red rock formations. You'll encounter iconic landmarks like the Flatirons, which provide a stunning backdrop. Other notable features include Boulder Creek, Eldorado Canyon, and the Royal Arch. You can also find highlights like Green Mountain Peak and Davidson Mesa Overlook offering panoramic views.
The mountain bike trails in Boulder County are highly rated by the komoot community, with an average score of 4.5 stars from over 90 reviews. Riders frequently praise the diverse terrain, from fast singletrack to scenic loops, and the stunning natural beauty, including the iconic Flatirons and extensive open spaces.
Boulder County has over 45,000 acres of conserved open space, and many trails are multi-use, shared with hikers and equestrians. While specific permits for mountain biking are not universally required, it's always advisable to check the Boulder County Open Space website for the latest regulations, trail conditions, and any specific permits needed for certain areas. You can find more information at bouldercounty.gov.
Many trails within Boulder County's open space allow dogs, but specific rules regarding leashes and waste removal apply and can vary by area. It's best to check the regulations for the specific trail or park you plan to visit on the Boulder County Open Space website to ensure a dog-friendly experience.
Most popular trailheads in Boulder County, such as those for Marshall Mesa, Betasso Preserve, and Heil Valley Ranch, offer designated parking areas. Due to the popularity of these trails, especially on weekends, it's recommended to arrive early to secure a spot. Always check specific trail information for parking details and any potential fees.
While popular trails can get busy, exploring areas slightly further afield or during off-peak hours can lead to a quieter experience. Trails near Nederland, such as those around Mud Lake, offer a cooler riding experience and can sometimes be less crowded than those closer to Boulder city, especially on hot days.
Boulder County has a public transportation system (RTD) that serves the city and surrounding areas. While some routes may get you close to trailheads, direct access to all mountain bike trails via public transport can be limited. It's recommended to plan your route in advance and check RTD schedules and bike-on-bus policies for the most convenient access.


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