These are the top Mountain Biking Trails in Boulder, according on the most recent ALLTrails data:

1. Walker Ranch Loop Moderate • 4.7(4272) Walker Ranch Park Length: 7.9 mi • Est. 3h 57m

Walker Ranch Loop is a versatile trail that appeals to both hikers and mountain bikers. This moderate 7.9-mile trail offers a diverse experience as it winds through Walker Ranch Park and a portion of El Dorado Canyon State Park. The loop can be tackled in either direction, but many prefer to start clockwise from the Walker Ranch Parking Access. Here, the trail begins with a downhill section, followed by a rewarding climb that opens up at the top near the Crescent Meadows Trailhead parking area. From this vantage point, you’ll enjoy panoramic views of the surrounding landscape. The journey continues with a two-mile descent and a brief stretch down steep steps, followed by another moderate ascent, completing the loop. Be prepared for varied terrain and breathtaking scenery along the way.

2. Flatirons Vista Trail Easy • 4.5(3081) Flatirons Vista Trailhead Length: 3.5 mi • Est. 1h 18m

The Flatirons Vista Trail is a leisurely 3.5-mile hike that lives up to its name by offering some of the most stunning views of the iconic Flatirons just outside Boulder. This trail is well-suited for hikers and those looking for a serene nature walk. Keep an eye out for birds of prey hunting in the grasslands and woodlands beneath the mountains. The sunset views from this trail are particularly impressive, making it an ideal spot for photographers. While the trail can be rocky in some sections, it’s generally accessible to hikers of all levels.

3. Walker Ranch, Ethel Harrold, and Canyon Falls Moderate • 4.6(1513) Walker Ranch Park Length: 3.5 mi • Est. 1h 43m

For a delightful and moderate outdoor adventure, explore the scenic beauty of Walker Ranch, Ethel Harrold, and Canyon Falls. This 3.5-mile trail is beloved by both hikers and mountain bikers for its varied terrain and natural attractions. Whether you’re seeking a peaceful hike or an exciting biking experience, this trail has something for everyone.

4. Canyon Loop Moderate • 4.6(1232) Betasso Preserve Length: 3.3 mi • Est. 1h 27m Bikes are NOT allowed on Saturdays and Wednesdays.

The Canyon Loop at Betasso Preserve offers a moderate mountain biking experience, showcasing the beauty of the area. Please note that bikes are not permitted on Saturdays and Wednesdays to ensure a safe and enjoyable experience for all trail users. Enjoy the picturesque landscapes and diverse terrain as you explore this popular trail.

5. Canyon Loop and Benjamin Trail Loop Moderate • 4.6(1216) Betasso Preserve Length: 7.8 mi • Est. 3h 31m

Betasso Preserve boasts two loops: the Canyon Loop and the Benjamin Loop. These loops are directional, ensuring a smooth flow of traffic. This route takes you on a comprehensive tour of the entire preserve, providing ample opportunities to soak in the natural beauty. Keep in mind that while there is parking at the trailhead, restroom facilities are not available, so plan accordingly.

6. South Boulder Creek via Walker Ranch Trail Moderate • 4.7(640) Walker Ranch Park Length: 3.5 mi • Est. 1h 40m

Embark on a moderate adventure along the South Boulder Creek via Walker Ranch Trail. This 3.5-mile trail is a perfect choice for both hikers and mountain bikers looking for an enjoyable outing. The trail offers a mix of natural beauty and outdoor recreation, providing an excellent opportunity to connect with nature.

7. Doudy Draw and Spring Brook Loop Trail Moderate • 4.5(794) Doudy Draw Trailhead Length: 4.9 mi • Est. 2h 0m

Doudy Draw Trail, combined with the Spring Brook Loop Trail, offers a moderate hiking and biking experience. As you traverse this 4.9-mile route, you’ll meander through picturesque landscapes. The trail leads you toward the Eldorado Mountain Habitat Conservation Area, where you’ll find the Goshawk Ridge Trail. Keep in mind that off-trail travel within the HCA requires a permit. After passing the Spring Brook Loop junction, Doudy Draw crosses a creek and ascends the slope, providing a rewarding outdoor experience.

8. Sugarloaf Mountain Trail Moderate • 4.6(907) Roosevelt National Forest Length: 1.3 mi • Est. 49m

Sugarloaf Mountain Trail, nestled in the Roosevelt National Forest, offers a moderate 1.3-mile hike that provides a quick escape into the great outdoors. While relatively short, this trail promises a satisfying hike and an opportunity to immerse yourself in the tranquility of nature.

9. Wonderland Lake Trail Easy • 4.4(920) Wonderland Lake Park Length: 1.8 mi • Est. 36m

Wonderland Lake Trail is a delightful, easy trail that treats visitors to stunning scenery, abundant birdlife, and occasional wildlife sightings, including deer. The path is a combination of paved and softer gravel or dirt surfaces, ensuring a pleasant walking experience. Accessibility is accommodating to a wide range of visitors, including those with wheelchairs, mobility equipment, or strollers.

10. Flatirons Vista North Trail Easy • 4.6(518) Flatirons Vista Trailhead Length: 2.3 mi • Est. 52m

Flatirons Vista North Trail is a shorter and easier option, spanning 2.3 miles, and offers a scenic walk with panoramic views. This trail is perfect for a brisk hike, allowing you to savor the beauty of the surrounding landscape.