The best MTB trails in Boulder County

195rides

4.4

(77)

3,761 people rode here

Mountain biking in Boulder County is one of the best ways to explore more of this area of Colorado. To help you experience the best the region has to offer, we’ve reviewed our full collection of mountain bike routes to bring you the best. Just click on any of the routes below to browse real tips and photos shared by other members of Komoot’s mountain biking community, to see what they liked most about these Tours—and to find the perfect mountain bike route for your next ride.

Marshall Mesa loop via Dowdy Draw Trail — Boulder	Intermediate 02:35 29.0km
Canyon Loop & Benjamin Loop – Betasso Preserve	Expert 01:36 14.6km
Marshall Mesa loop — Boulder	Intermediate 02:11 24.9km
Hall Ranch Loop — North Foothills Open Space	Expert 01:47 18.6km
Marshall Mesa loop — Boulder Open Space and Mountain Parks	Intermediate 02:03 22.0km
Walker Ranch Loop – Walker Ranch Park & Eldorado Canyon State Park	Intermediate 01:27 12.6km
West Magnolia loop — Nederland	Expert 01:37 15.6km
South St. Vrain loops — Ward, Colorado	Intermediate 03:01 29.0km
North Boulder loop — Boulder	Easy 01:11 14.5km

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Map data © OpenStreetMap contributors
1
1
Marshall Mesa loop via Dowdy Draw Trail — Boulder
02:35
29.0km
11.2km/h
330m
330m
Intermediate
4.7
(3)
209
Intermediate mountain bike ride. Good fitness required. Advanced riding skills necessary.
Map data © OpenStreetMap contributors
2
2
Canyon Loop & Benjamin Loop – Betasso Preserve
01:36
14.6km
9.1km/h
420m
420m
Expert
2.7
(3)
200
Expert 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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Map data © OpenStreetMap contributors
3
3
Marshall Mesa loop — Boulder
02:11
24.9km
11.4km/h
260m
260m
Intermediate
4.7
(3)
187
Intermediate mountain bike ride. Good fitness required. Advanced riding skills necessary.
Map data © OpenStreetMap contributors
4
4
Hall Ranch Loop — North Foothills Open Space
01:47
18.6km
10.5km/h
440m
440m
Expert
4.4
(5)
177
Expert mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
Map data © OpenStreetMap contributors
5
5
Marshall Mesa loop — Boulder Open Space and Mountain Parks
02:03
22.0km
10.8km/h
310m
310m
Intermediate
4.3
(4)
166
Intermediate mountain bike ride. Good fitness required. Advanced riding skills necessary.
Map data © OpenStreetMap contributors
6
6
Walker Ranch Loop – Walker Ranch Park & Eldorado Canyon State Park
01:27
12.6km
8.7km/h
420m
420m
Intermediate
4.0
(2)
102
Intermediate mountain bike ride. Good fitness required. Suitable for all skill levels.
Map data © OpenStreetMap contributors
7
7
West Magnolia loop — Nederland
01:37
15.6km
9.6km/h
370m
370m
Expert
5.0
(1)
67
Expert mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
Map data © OpenStreetMap contributors
8
8
South St. Vrain loops — Ward, Colorado
03:01
29.0km
9.6km/h
700m
700m
Intermediate
5.0
(1)
12
Intermediate mountain bike ride. Good fitness required. Suitable for all skill levels.
Map data © OpenStreetMap contributors
9
9
North Boulder loop — Boulder
01:11
14.5km
12.3km/h
110m
110m
Easy
5.0
(2)
11
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.