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Boulder Mountainbike Alliance


OUR MISSION:

The Boulder Mountainbike Alliance's mission is to serve as a positive voice for mountain biking in the greater Boulder Colorado area by improving the trail experience for all users through social rides and events, advocacy, and trail building.

Great communities build trails, and great trails build community.

To fullfill this mission, the Boulder Mountainbike Alliance works towards three major goals:

Create a Community of Mountain Bikers: Part of creating sustainable trails is ensuring that there will always be a community around to care for and advocate for those trails. BMA can't do its job without a community of bikers who understand and support our mission. And we build that community around a shared love of trails, then back it up with fun social events and group rides.

Advocate for Trail Access: Originally established in 1991 as the Boulder Offroad Alliance (BOA), Boulder Mountainbike Alliance was formed in response to the closure of nearly every trail in the Boulder area to mountain bikes. This group became the only representative organization for mountain bikers who wanted the right to ride legally in Boulder again.

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Featured Rides: 22

7.4 mi 11.9 km
Betasso Preserve
Boulder, CO
7.4 mi 11.9 km Boulder, CO
All Clear
Update
18 days ago
204 
11.8 mi 18.9 km
Hall Ranch
Lyons, CO
11.8 mi 18.9 km Lyons, CO
All Clear
Update
Dry
1 day ago
220 
7.8 mi 12.6 km
Walker Ranch
Coal Creek, CO
7.8 mi 12.6 km Coal Creek, CO
All Clear
Update
Dry
18 days ago
166 
7.9 mi 12.7 km
Heil Ranch
Lyons, CO
7.9 mi 12.7 km Lyons, CO
All Clear
Update
Dry
1 day ago
126 
Superior, CO
10.3 mi 16.6 km Superior, CO
All Clear
Update
Dry
18 days ago
77 
15.7 mi 25.3 km
Dirty Bismark
Superior, CO
15.7 mi 25.3 km Superior, CO
All Clear
Update
Dry
25 days ago
143 
Nederland, CO
12.2 mi 19.6 km Nederland, CO
All Clear
Update
Dry
11 days ago
48 
12.6 mi 20.2 km
Spring Brook Loop
Superior, CO
12.6 mi 20.2 km Superior, CO
All Clear
Update
10 days ago
65 
Lyons, CO
14.6 mi 23.5 km Lyons, CO
All Clear
Update
Dry
4 days ago
44 
16.2 mi 26.1 km
Super Betasso
Boulder, CO
16.2 mi 26.1 km Boulder, CO
All Clear
Update
24 days ago
49 
7.1 mi 11.4 km
West Magnolia Tour
Nederland, CO
7.1 mi 11.4 km Nederland, CO
All Clear
Update
Dry
79 days ago
49 
Nederland, CO
16.3 mi 26.2 km Nederland, CO
All Clear
Update
a little rain today but should dry up fast. watch out for the branches sticking out!
33 days ago
42 
Lyons, CO
32.9 mi 53.0 km Lyons, CO
All Clear
Update
Dry
87 days ago
23 
10.1 mi 16.2 km
Rhythm & Blues
Nederland, CO
10.1 mi 16.2 km Nederland, CO
All Clear
Update
40 days ago
15 
10.1 mi 16.3 km
Ride like a Moto
Niwot, CO
10.1 mi 16.3 km Niwot, CO
All Clear
Update
Dry
41 days ago
23 
Boulder, CO
71.3 mi 114.7 km Boulder, CO
All Clear
Update
A few puddles on Rollins Pass. Even with that it’s all in great shape.
4 days ago
Boulder, CO
2.0 mi 3.2 km Boulder, CO
All Clear
Update
Dry
71 days ago
17 
Erie, CO
6.7 mi 10.8 km Erie, CO
All Clear
Update
10 days ago
23 
Nederland, CO
6.2 mi 9.9 km Nederland, CO
Unknown
Update
14 
12.2 mi 19.6 km
East Boulder Trail
Gunbarrel, CO
12.2 mi 19.6 km Gunbarrel, CO
Unknown
Update
11.8 mi 18.9 km
Rock Creek Farm Loop
Broomfield, CO
11.8 mi 18.9 km Broomfield, CO
Unknown
Update
14 
Boulder, CO
11.4 mi 18.4 km Boulder, CO
All Clear
Update
24 days ago
11 

Trails: 108

5.3 mi 8.5 km
Picture Rock
Lyons, CO
5.3 mi 8.5 km Lyons, CO
All Clear
Update
Dry
4 days ago
77 
Lyons, CO
2.5 mi 4.0 km Lyons, CO
All Clear
Update
Dry - Trail lil drifty, could use some rain
19 days ago
59 
2.2 mi 3.6 km
Nelson Loop
Lyons, CO
2.2 mi 3.6 km Lyons, CO
All Clear
Update
Dry - Trail lil drifty, could use some rain
19 days ago
44 
1.2 mi 1.9 km
Betasso Link Trail
Boulder, CO
1.2 mi 1.9 km Boulder, CO
All Clear
Update
Dry
17 days ago
52 
Lyons, CO
1.4 mi 2.2 km Lyons, CO
All Clear
Update
Dry - Trail lil drifty, could use some rain
19 days ago
33 
2.3 mi 3.7 km
Benjamin Loop
Boulder, CO
2.3 mi 3.7 km Boulder, CO
All Clear
Update
18 days ago
28 
3.3 mi 5.3 km
Canyon Loop
Boulder, CO
3.3 mi 5.3 km Boulder, CO
All Clear
Update
24 days ago
35 
0.9 mi 1.5 km
Antelope Trail
Lyons, CO
0.9 mi 1.5 km Lyons, CO
All Clear
Update
Dry
33 days ago
30 
2.9 mi 4.7 km
Wild Turkey Trail
Lyons, CO
2.9 mi 4.7 km Lyons, CO
All Clear
Update
Dry - Perfect conditions
34 days ago
32 
0.1 mi 0.2 km
Dual Slalom
Boulder, CO
0.1 mi 0.2 km Boulder, CO
All Clear
Update
Dry
71 days ago
0.1 mi 0.2 km
XL Slopestyle
Boulder, CO
0.1 mi 0.2 km Boulder, CO
All Clear
Update
Dry
71 days ago
0.1 mi 0.2 km
Corkscrew
Boulder, CO
0.1 mi 0.2 km Boulder, CO
All Clear
Update
Dry
71 days ago
3.2 mi 5.2 km
School Bus #929
Nederland, CO
3.2 mi 5.2 km Nederland, CO
All Clear
Update
Issues on this trail tend to be weather related. If you ride after or during a rain then you'll encounter mud.
28 days ago
18 
Nederland, CO
6.0 mi 9.7 km Nederland, CO
All Clear
Update
Dry
60 days ago
13 
0.7 mi 1.0 km
Black Line
Erie, CO
0.7 mi 1.0 km Erie, CO
All Clear
Update
10 days ago
10 
2.6 mi 4.1 km
Wapiti Trail
Lyons, CO
2.6 mi 4.1 km Lyons, CO
All Clear
Update
Dry - Clear as can be
11 days ago
34 
0.1 mi 0.2 km
Large Slopestyle
Boulder, CO
0.1 mi 0.2 km Boulder, CO
All Clear
Update
Dry
71 days ago
0.1 mi 0.1 km
Medium Slopestyle
Boulder, CO
0.1 mi 0.1 km Boulder, CO
All Clear
Update
Dry
71 days ago
2.7 mi 4.3 km
Ponderosa Loop
Lyons, CO
2.7 mi 4.3 km Lyons, CO
All Clear
Update
Dry - Clear as can be
11 days ago
31 
Nederland, CO
5.9 mi 9.5 km Nederland, CO
All Clear
Update
Dry
47 days ago
23 
Boulder, CO
0.6 mi 1.0 km Boulder, CO
All Clear
Update
Dry
71 days ago
0.1 mi 0.2 km
Small Slopestyle
Boulder, CO
0.1 mi 0.2 km Boulder, CO
All Clear
Update
Dry
71 days ago
3.0 mi 4.8 km
Eagle Wind
Lyons, CO
3.0 mi 4.8 km Lyons, CO
Minor Issues
Update
Some Mud - Some mud - going clockwise there a few mud puddles on the first half and consistent mud puddles in the second half
53 days ago
24 
0.8 mi 1.3 km
Fourmile Link
Boulder, CO
0.8 mi 1.3 km Boulder, CO
All Clear
Update
24 days ago
14 
0.7 mi 1.2 km
Green Trail
Erie, CO
0.7 mi 1.2 km Erie, CO
All Clear
Update
10 days ago
14 
0.3 mi 0.5 km
Dirt 101
Boulder, CO
0.3 mi 0.5 km Boulder, CO
All Clear
Update
Dry
71 days ago
Nederland, CO
0.9 mi 1.5 km Nederland, CO
Unknown
Update
10 
1.4 mi 2.3 km
Re-Root #927
Nederland, CO
1.4 mi 2.3 km Nederland, CO
Unknown
Update
13 
1.7 mi 2.8 km
Little Raven Trail
Nederland, CO
1.7 mi 2.8 km Nederland, CO
All Clear
Update
Dry
60 days ago
2.2 mi 3.5 km
Doudy Draw
Superior, CO
2.2 mi 3.5 km Superior, CO
All Clear
Update
10 days ago
22 
0.7 mi 1.1 km
Blue Trail
Erie, CO
0.7 mi 1.1 km Erie, CO
All Clear
Update
10 days ago
12 
Nederland, CO
1.9 mi 3.1 km Nederland, CO
Unknown
Update
Superior, CO
1.4 mi 2.2 km Superior, CO
All Clear
Update
Dry
18 days ago
19 
Boulder, CO
1.9 mi 3.1 km Boulder, CO
All Clear
Update
Dry
18 days ago
17 
Nederland, CO
0.5 mi 0.8 km Nederland, CO
Unknown
Update
0.9 mi 1.5 km
Sugar Magnolia #926
Nederland, CO
0.9 mi 1.5 km Nederland, CO
Unknown
Update
10 
0.1 mi 0.2 km
Espresso
Boulder, CO
0.1 mi 0.2 km Boulder, CO
All Clear
Update
Dry
71 days ago
0.6 mi 0.9 km
Coal Seam
Superior, CO
0.6 mi 0.9 km Superior, CO
All Clear
Update
10 days ago
Superior, CO
2.1 mi 3.4 km Superior, CO
All Clear
Update
Dry
25 days ago
17 
0.9 mi 1.4 km
Marshall Valley
Superior, CO
0.9 mi 1.4 km Superior, CO
All Clear
Update
Dry
25 days ago
10 
2.3 mi 3.7 km
Wapiti Trail
Nederland, CO
2.3 mi 3.7 km Nederland, CO
All Clear
Update
Dry
34 days ago
11.4 mi 18.3 km
Coal Creek Trail
Superior, CO
11.4 mi 18.3 km Superior, CO
All Clear
Update
Some areas eroded from recent heavy rains.
28 days ago
10 
1.1 mi 1.7 km
Reboot
Nederland, CO
1.1 mi 1.7 km Nederland, CO
Unknown
Update
0.7 mi 1.1 km
Boot
Nederland, CO
0.7 mi 1.1 km Nederland, CO
Unknown
Update
0.4 mi 0.6 km
Hotlap
Boulder, CO
0.4 mi 0.6 km Boulder, CO
All Clear
Update
Dry
71 days ago
0.2 mi 0.3 km
Skillz Loop
Boulder, CO
0.2 mi 0.3 km Boulder, CO
All Clear
Update
Dry
71 days ago
2.9 mi 4.7 km
Left Hand
Niwot, CO
2.9 mi 4.7 km Niwot, CO
All Clear
Update
85 days ago
2.6 mi 4.2 km
Winiger Ridge Trail
Coal Creek, CO
2.6 mi 4.2 km Coal Creek, CO
Unknown
Update
Nederland, CO
2.9 mi 4.6 km Nederland, CO
All Clear
Update
Dry - Some rerouting of the hikeabike sections would elevate the experience and flow.
4 days ago
Coal Creek, CO
1.0 mi 1.7 km Coal Creek, CO
All Clear
Update
Dry - Dusty!
25 days ago
Nederland, CO
0.8 mi 1.3 km Nederland, CO
All Clear
Update
Dry
40 days ago
2.7 mi 4.4 km
High Plains
Superior, CO
2.7 mi 4.4 km Superior, CO
All Clear
Update
Dry
25 days ago
1.1 mi 1.8 km
Prairie Vista
Superior, CO
1.1 mi 1.8 km Superior, CO
All Clear
Update
Dry
25 days ago
1.0 mi 1.6 km
Hobbit 3 #927
Nederland, CO
1.0 mi 1.6 km Nederland, CO
Unknown
Update
Superior, CO
3.0 mi 4.8 km Superior, CO
All Clear
Update
Some erosion from recent heavy rains.
28 days ago
Coal Creek, CO
2.6 mi 4.2 km Coal Creek, CO
All Clear
Update
24 days ago
2.3 mi 3.8 km
Meadowlark
Superior, CO
2.3 mi 3.8 km Superior, CO
Unknown
Update
8.2 mi 13.3 km
Boulder Creek Path
Boulder, CO
8.2 mi 13.3 km Boulder, CO
All Clear
Update
A few puddles on Rollins Pass. Even with that it’s all in great shape.
4 days ago
11 
Gunbarrel, CO
2.1 mi 3.3 km Gunbarrel, CO
Unknown
Update
0.9 mi 1.4 km
Tungsten Loop
Nederland, CO
0.9 mi 1.4 km Nederland, CO
All Clear
Update
Mostly Dry
13 days ago
1.2 mi 1.9 km
Kinnickinnick Loop
Nederland, CO
1.2 mi 1.9 km Nederland, CO
All Clear
Update
Mostly Dry
13 days ago
Niwot, CO
3.7 mi 6.0 km Niwot, CO
Unknown
Update
Nederland, CO
0.8 mi 1.3 km Nederland, CO
Unknown
Update
1.5 mi 2.4 km
355D
Nederland, CO
1.5 mi 2.4 km Nederland, CO
Unknown
Update
2.3 mi 3.6 km
Waldrop Trail
Nederland, CO
2.3 mi 3.6 km Nederland, CO
All Clear
Update
Dry
34 days ago
3.3 mi 5.3 km
Dry Creek Trail
Lafayette, CO
3.3 mi 5.3 km Lafayette, CO
Unknown
Update
Niwot, CO
2.3 mi 3.6 km Niwot, CO
Unknown
Update
Niwot, CO
2.5 mi 4.1 km Niwot, CO
Unknown
Update
0.7 mi 1.1 km
Lookout Trail #926
Nederland, CO
0.7 mi 1.1 km Nederland, CO
Unknown
Update
3.2 mi 5.1 km
Eagle
Gunbarrel, CO
3.2 mi 5.1 km Gunbarrel, CO
Unknown
Update
1.4 mi 2.3 km
Greenbelt Plateau
Superior, CO
1.4 mi 2.3 km Superior, CO
All Clear
Update
Mostly Dry
36 days ago
11 
3.7 mi 6.0 km
Community Ditch
Superior, CO
3.7 mi 6.0 km Superior, CO
All Clear
Update
10 days ago
14 
Lyons, CO
0.9 mi 1.5 km Lyons, CO
Unknown
Update
0.5 mi 0.9 km
Sunset Ridge
Erie, CO
0.5 mi 0.9 km Erie, CO
All Clear
Update
10 days ago
2.6 mi 4.2 km
Chapman Drive
Boulder, CO
2.6 mi 4.2 km Boulder, CO
All Clear
Update
A few puddles on Rollins Pass. Even with that it’s all in great shape.
4 days ago
1.2 mi 2.0 km
Hobbit 1 #927
Nederland, CO
1.2 mi 2.0 km Nederland, CO
Unknown
Update
10 
8.8 mi 14.2 km
Lake Link Trail
Broomfield, CO
8.8 mi 14.2 km Broomfield, CO
Unknown
Update
0.6 mi 1.0 km
Little Raven East
Nederland, CO
0.6 mi 1.0 km Nederland, CO
All Clear
Update
Dry: Dry, some loose baby heads. Very challenging as an ascent.
80 days ago
2.5 mi 4.0 km
Foothills
Boulder, CO
2.5 mi 4.0 km Boulder, CO
All Clear
Update
Dry
4 days ago
0.8 mi 1.3 km
Cowdrey Draw
Superior, CO
0.8 mi 1.3 km Superior, CO
All Clear
Update
Dry
25 days ago
Niwot, CO
2.9 mi 4.7 km Niwot, CO
Unknown
Update
Gunbarrel, CO
2.2 mi 3.5 km Gunbarrel, CO
Minor Issues
Update
Dry - Lots of tall grass and narrow ruts
98 days ago
Gunbarrel, CO
1.9 mi 3.1 km Gunbarrel, CO
Unknown
Update
Boulder, CO
3.4 mi 5.4 km Boulder, CO
All Clear
Update
Dry
71 days ago
Nederland, CO
0.8 mi 1.3 km Nederland, CO
Unknown
Update
1.3 mi 2.0 km
Cottontail Trail
Gunbarrel, CO
1.3 mi 2.0 km Gunbarrel, CO
Unknown
Update
2.1 mi 3.3 km
Interim Joder Trail
Niwot, CO
2.1 mi 3.3 km Niwot, CO
All Clear
Update
85 days ago
3.1 mi 4.9 km
Davidson Mesa Loop
Louisville, CO
3.1 mi 4.9 km Louisville, CO
Unknown
Update
0.5 mi 0.7 km
Erie Forest
Erie, CO
0.5 mi 0.7 km Erie, CO
All Clear
Update
10 days ago
0.9 mi 1.5 km
Rock Creek Trail
Broomfield, CO
0.9 mi 1.5 km Broomfield, CO
Unknown
Update
Superior, CO
1.2 mi 1.9 km Superior, CO
All Clear
Update
Dry
25 days ago
2.8 mi 4.5 km
Coalton
Superior, CO
2.8 mi 4.5 km Superior, CO
All Clear
Update
Dry
25 days ago
1.9 mi 3.0 km
Sage
Gunbarrel, CO
1.9 mi 3.0 km Gunbarrel, CO
Unknown
Update
1.3 mi 2.1 km
Twin Lakes Loops
Gunbarrel, CO
1.3 mi 2.1 km Gunbarrel, CO
Unknown
Update
Lyons, CO
2.0 mi 3.2 km Lyons, CO
Unknown
Update
1.2 mi 2.0 km
Dots Access Road
Nederland, CO
1.2 mi 2.0 km Nederland, CO
Unknown
Update
2.4 mi 3.8 km
355
Nederland, CO
2.4 mi 3.8 km Nederland, CO
Unknown
Update
1.6 mi 2.6 km
Mary Miller Trail
Broomfield, CO
1.6 mi 2.6 km Broomfield, CO
Unknown
Update
Gunbarrel, CO
1.1 mi 1.7 km Gunbarrel, CO
Unknown
Update
2.1 mi 3.3 km
CU South Campus
Boulder, CO
2.1 mi 3.3 km Boulder, CO
Unknown
Update
3.6 mi 5.7 km
Boulder Reservoir
Gunbarrel, CO
3.6 mi 5.7 km Gunbarrel, CO
Unknown
Update
Gunbarrel, CO
2.1 mi 3.4 km Gunbarrel, CO
Unknown
Update
1.3 mi 2.0 km
Cottonwood Trail
Gunbarrel, CO
1.3 mi 2.0 km Gunbarrel, CO
Unknown
Update
1.5 mi 2.5 km
CR 132 West
Nederland, CO
1.5 mi 2.5 km Nederland, CO
Unknown
Update
1.7 mi 2.7 km
Indian Mesa
Lyons, CO
1.7 mi 2.7 km Lyons, CO
Unknown
Update
1.6 mi 2.5 km
North Rim
Boulder, CO
1.6 mi 2.5 km Boulder, CO
Unknown
Update
0.9 mi 1.5 km
355C
Nederland, CO
0.9 mi 1.5 km Nederland, CO
Unknown
Update
0.4 mi 0.6 km
355T
Nederland, CO
0.4 mi 0.6 km Nederland, CO
Unknown
Update