MTB Project Logo

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: 23

7.4 mi 11.9 km
Betasso Preserve
Boulder, CO
7.4 mi 11.9 km Boulder, CO
All Clear
Update
Dry
2 days ago
165 
11.8 mi 18.9 km
Hall Ranch
Lyons, CO
11.8 mi 18.9 km Lyons, CO
All Clear
Update
15 days ago
190 
7.8 mi 12.6 km
Walker Ranch
Coal Creek, CO
7.8 mi 12.6 km Coal Creek, CO
All Clear
Update
11 days ago
146 
7.9 mi 12.7 km
Heil Ranch
Lyons, CO
7.9 mi 12.7 km Lyons, CO
Minor Issues
Update
Mostly Dry: A few puddles, nothing too bad.
2 days ago
104 
15.7 mi 25.3 km
Dirty Bismark
Superior, CO
15.7 mi 25.3 km Superior, CO
All Clear
Update
Dry
2 days ago
125 
Superior, CO
10.3 mi 16.6 km Superior, CO
Bad / Closed
Update
4 days ago
62 
12.6 mi 20.2 km
Spring Brook Loop
Superior, CO
12.6 mi 20.2 km Superior, CO
All Clear
Update
Dry
4 days ago
51 
16.2 mi 26.1 km
Super Betasso
Boulder, CO
16.2 mi 26.1 km Boulder, CO
All Clear
Update
Mostly Dry, Some Mud
5 days ago
44 
7.1 mi 11.4 km
West Magnolia Tour
Nederland, CO
7.1 mi 11.4 km Nederland, CO
All Clear
Update
Dry
3 days ago
42 
Lyons, CO
14.6 mi 23.5 km Lyons, CO
All Clear
Update
Mildly moist in some spots
10 days ago
26 
Nederland, CO
16.3 mi 26.2 km Nederland, CO
Unknown
Update
27 
Lyons, CO
32.9 mi 53.0 km Lyons, CO
Minor Issues
Update
Mostly Dry, Some Mud - A number of puddles and a few muddy spots.
10 days ago
20 
12.3 mi 19.8 km
Super Magic Bus
Nederland, CO
12.3 mi 19.8 km Nederland, CO
All Clear
Update
Dry
1 day ago
30 
10.9 mi 17.6 km
Rhythm & Blues
Nederland, CO
10.9 mi 17.6 km Nederland, CO
All Clear
Update
Dry
3 days ago
10.1 mi 16.3 km
Ride like a Moto
Niwot, CO
10.1 mi 16.3 km Niwot, CO
Minor Issues
Update
Mostly Dry
4 days ago
17 
Boulder, CO
2.0 mi 3.2 km Boulder, CO
All Clear
Update
63 days ago
14 
Boulder, CO
71.9 mi 115.7 km Boulder, CO
Unknown
Update
Erie, CO
6.7 mi 10.8 km Erie, CO
All Clear
Update
Dry - Quiet!
9 days ago
20 
Nederland, CO
6.2 mi 9.9 km Nederland, CO
All Clear
Update
Some Mud: nearly all of the trail is wet but not muddy.
7 days ago
11 
12.2 mi 19.6 km
East Boulder Trail
Gunbarrel, CO
12.2 mi 19.6 km Gunbarrel, CO
All Clear
Update
Mostly Dry: A few muddy spots, should be good to go by tomorrow.
22 days ago
11.8 mi 18.9 km
Rock Creek Farm Loop
Broomfield, CO
11.8 mi 18.9 km Broomfield, CO
All Clear
Update
Mostly Dry
76 days ago
12 
Boulder, CO
11.4 mi 18.4 km Boulder, CO
Unknown
Update
Nederland, CO
5.8 mi 9.3 km Nederland, CO
Unknown
Update

Trails: 109

5.3 mi 8.5 km
Picture Rock
Lyons, CO
5.3 mi 8.5 km Lyons, CO
Minor Issues
Update
Muddy
3 days ago
71 
Lyons, CO
2.5 mi 4.0 km Lyons, CO
Minor Issues
Update
Some Mud
20 days ago
53 
2.2 mi 3.6 km
Nelson Loop
Lyons, CO
2.2 mi 3.6 km Lyons, CO
All Clear
Update
Dry
16 days ago
37 
1.2 mi 1.9 km
Betasso Link Trail
Boulder, CO
1.2 mi 1.9 km Boulder, CO
All Clear
Update
Dry
34 days ago
44 
2.3 mi 3.7 km
Benjamin Loop
Boulder, CO
2.3 mi 3.7 km Boulder, CO
All Clear
Update
Dry
2 days ago
24 
Lyons, CO
1.4 mi 2.2 km Lyons, CO
All Clear
Update
Dry
16 days ago
28 
Nederland, CO
6.0 mi 9.7 km Nederland, CO
Unknown
Update
10 
3.3 mi 5.3 km
Canyon Loop
Boulder, CO
3.3 mi 5.3 km Boulder, CO
All Clear
Update
Dry
2 days ago
28 
0.1 mi 0.2 km
XL Slopestyle
Boulder, CO
0.1 mi 0.2 km Boulder, CO
All Clear
Update
Dry
28 days ago
0.1 mi 0.2 km
Dual Slalom
Boulder, CO
0.1 mi 0.2 km Boulder, CO
All Clear
Update
Dry
28 days ago
Boulder, CO
0.6 mi 1.0 km Boulder, CO
All Clear
Update
Dry
28 days ago
0.1 mi 0.1 km
Medium Slopestyle
Boulder, CO
0.1 mi 0.1 km Boulder, CO
All Clear
Update
Dry
28 days ago
0.9 mi 1.5 km
Antelope Trail
Lyons, CO
0.9 mi 1.5 km Lyons, CO
All Clear
Update
Dry
2 days ago
26 
0.1 mi 0.2 km
Large Slopestyle
Boulder, CO
0.1 mi 0.2 km Boulder, CO
All Clear
Update
Dry
28 days ago
2.9 mi 4.7 km
Wild Turkey Trail
Lyons, CO
2.9 mi 4.7 km Lyons, CO
Minor Issues
Update
Mostly Dry: A few puddles, nothing too bad.
2 days ago
29 
0.1 mi 0.2 km
Corkscrew
Boulder, CO
0.1 mi 0.2 km Boulder, CO
All Clear
Update
Dry
28 days ago
3.2 mi 5.2 km
School Bus #929
Nederland, CO
3.2 mi 5.2 km Nederland, CO
Unknown
Update
15 
Nederland, CO
5.9 mi 9.5 km Nederland, CO
Unknown
Update
20 
0.7 mi 1.0 km
Black Line
Erie, CO
0.7 mi 1.0 km Erie, CO
All Clear
Update
Dry: Good to go!
31 days ago
0.1 mi 0.2 km
Small Slopestyle
Boulder, CO
0.1 mi 0.2 km Boulder, CO
All Clear
Update
Dry
14 days ago
2.7 mi 4.3 km
Ponderosa Loop
Lyons, CO
2.7 mi 4.3 km Lyons, CO
Minor Issues
Update
Mostly Dry, Some Mud
3 days ago
28 
2.6 mi 4.1 km
Wapiti Trail
Lyons, CO
2.6 mi 4.1 km Lyons, CO
Minor Issues
Update
Mostly Dry: A few puddles, nothing too bad.
2 days ago
28 
1.7 mi 2.8 km
Little Raven Trail
Nederland, CO
1.7 mi 2.8 km Nederland, CO
Unknown
Update
Nederland, CO
0.5 mi 0.8 km Nederland, CO
Unknown
Update
3.0 mi 4.8 km
Eagle Wind
Lyons, CO
3.0 mi 4.8 km Lyons, CO
All Clear
Update
Dry - the trail itself is dry. If you take the Service Road detour there are a couple of small puddles but nothing to worry about.
1 day ago
22 
0.8 mi 1.3 km
Fourmile Link
Boulder, CO
0.8 mi 1.3 km Boulder, CO
Unknown
Update
13 
0.9 mi 1.5 km
Sugar Magnolia #926
Nederland, CO
0.9 mi 1.5 km Nederland, CO
Unknown
Update
1.4 mi 2.3 km
Re-Root #927
Nederland, CO
1.4 mi 2.3 km Nederland, CO
Unknown
Update
11 
0.7 mi 1.2 km
Green Trail
Erie, CO
0.7 mi 1.2 km Erie, CO
All Clear
Update
Dry: Good to go!
31 days ago
11 
Boulder, CO
1.9 mi 3.1 km Boulder, CO
All Clear
Update
Dry
28 days ago
17 
Nederland, CO
0.9 mi 1.5 km Nederland, CO
Unknown
Update
Nederland, CO
0.8 mi 1.3 km Nederland, CO
Unknown
Update
0.3 mi 0.5 km
Dirt 101
Boulder, CO
0.3 mi 0.5 km Boulder, CO
All Clear
Update
Dry
28 days ago
0.4 mi 0.6 km
Hotlap
Boulder, CO
0.4 mi 0.6 km Boulder, CO
All Clear
Update
Dry
28 days ago
Superior, CO
1.4 mi 2.2 km Superior, CO
All Clear
Update
Dry
28 days ago
17 
0.7 mi 1.1 km
Blue Trail
Erie, CO
0.7 mi 1.1 km Erie, CO
All Clear
Update
Dry: Good to go!
31 days ago
10 
0.6 mi 0.9 km
Coal Seam
Superior, CO
0.6 mi 0.9 km Superior, CO
All Clear
Update
Mostly Dry
9 days ago
2.2 mi 3.5 km
Doudy Draw
Superior, CO
2.2 mi 3.5 km Superior, CO
All Clear
Update
Mostly Dry
9 days ago
17 
Nederland, CO
2.9 mi 4.6 km Nederland, CO
All Clear
Update
Dry
3 days ago
1.1 mi 1.7 km
Reboot
Nederland, CO
1.1 mi 1.7 km Nederland, CO
All Clear
Update
Dry
3 days ago
Superior, CO
2.1 mi 3.4 km Superior, CO
All Clear
Update
Dry
28 days ago
16 
11.4 mi 18.3 km
Coal Creek Trail
Superior, CO
11.4 mi 18.3 km Superior, CO
All Clear
Update
Mostly Dry - The occasional tiny puddle exists, but the trail is dry and perfect otherwise. Ride it on 28c slicks without any issue.
50 days ago
0.9 mi 1.4 km
Marshall Valley
Superior, CO
0.9 mi 1.4 km Superior, CO
All Clear
Update
Mostly Dry
9 days ago
10 
Nederland, CO
1.9 mi 3.1 km Nederland, CO
All Clear
Update
Mostly Dry
27 days ago
0.7 mi 1.1 km
Boot
Nederland, CO
0.7 mi 1.1 km Nederland, CO
Unknown
Update
2.6 mi 4.2 km
Winiger Ridge Trail
Coal Creek, CO
2.6 mi 4.2 km Coal Creek, CO
Unknown
Update
2.3 mi 3.7 km
Wapiti Trail
Nederland, CO
2.3 mi 3.7 km Nederland, CO
Unknown
Update
Coal Creek, CO
1.0 mi 1.7 km Coal Creek, CO
All Clear
Update
Mostly Dry
34 days ago
1.0 mi 1.6 km
Hobbit 3 #927
Nederland, CO
1.0 mi 1.6 km Nederland, CO
Unknown
Update
2.7 mi 4.4 km
High Plains
Superior, CO
2.7 mi 4.4 km Superior, CO
All Clear
Update
Mostly Dry
9 days ago
2.9 mi 4.7 km
Left Hand
Niwot, CO
2.9 mi 4.7 km Niwot, CO
Bad / Closed
Update
Muddy
35 days ago
2.3 mi 3.8 km
Meadowlark
Superior, CO
2.3 mi 3.8 km Superior, CO
All Clear
Update
Dry
28 days ago
Coal Creek, CO
2.6 mi 4.2 km Coal Creek, CO
Minor Issues
Update
Snowy, Some Mud
57 days ago
1.1 mi 1.8 km
Prairie Vista
Superior, CO
1.1 mi 1.8 km Superior, CO
All Clear
Update
Dry
28 days ago
0.7 mi 1.2 km
Hobbit 2 #927
Nederland, CO
0.7 mi 1.2 km Nederland, CO
Unknown
Update
Superior, CO
3.0 mi 4.8 km Superior, CO
All Clear
Update
Mostly Dry
9 days ago
Niwot, CO
3.7 mi 6.0 km Niwot, CO
Unknown
Update
Gunbarrel, CO
2.1 mi 3.3 km Gunbarrel, CO
Minor Issues
Update
Muddy
35 days ago
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
Unknown
Update
Gunbarrel, CO
2.2 mi 3.5 km Gunbarrel, CO
Unknown
Update
Nederland, CO
0.8 mi 1.3 km Nederland, CO
Unknown
Update
3.3 mi 5.3 km
Dry Creek Trail
Lafayette, CO
3.3 mi 5.3 km Lafayette, CO
Unknown
Update
Nederland, CO
0.8 mi 1.3 km Nederland, 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
0.1 mi 0.2 km
Espresso
Boulder, CO
0.1 mi 0.2 km Boulder, CO
All Clear
Update
Dry
28 days ago
0.2 mi 0.3 km
Skillz Loop
Boulder, CO
0.2 mi 0.3 km Boulder, CO
All Clear
Update
Dry
28 days ago
3.2 mi 5.1 km
Eagle
Gunbarrel, CO
3.2 mi 5.1 km Gunbarrel, CO
All Clear
Update
Some Mud
2 days ago
3.7 mi 6.0 km
Community Ditch
Superior, CO
3.7 mi 6.0 km Superior, CO
All Clear
Update
Mostly Dry
9 days ago
14 
Lyons, CO
0.9 mi 1.5 km Lyons, CO
All Clear
Update
Dry - the trail itself is dry. If you take the Service Road detour there are a couple of small puddles but nothing to worry about.
1 day ago
0.5 mi 0.9 km
Sunset Ridge
Erie, CO
0.5 mi 0.9 km Erie, CO
All Clear
Update
Dry: Good to go!
31 days ago
2.6 mi 4.2 km
Chapman Drive
Boulder, CO
2.6 mi 4.2 km Boulder, CO
Minor Issues
Update
Mostly Dry: several short sections of pocked ice- some very slippery and some rideable
76 days ago
0.7 mi 1.1 km
Lookout Trail #926
Nederland, CO
0.7 mi 1.1 km Nederland, 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
9 days ago
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
Unknown
Update
8.2 mi 13.3 km
Boulder Creek Path
Boulder, CO
8.2 mi 13.3 km Boulder, CO
Unknown
Update
1.2 mi 2.0 km
Hobbit 1 #927
Nederland, CO
1.2 mi 2.0 km Nederland, CO
Unknown
Update
0.8 mi 1.3 km
Cowdrey Draw
Superior, CO
0.8 mi 1.3 km Superior, CO
All Clear
Update
Mostly Dry
9 days ago
Niwot, CO
2.9 mi 4.7 km Niwot, CO
Unknown
Update
Gunbarrel, CO
1.9 mi 3.1 km Gunbarrel, CO
Unknown
Update
Boulder, CO
3.4 mi 5.4 km Boulder, CO
Unknown
Update
0.9 mi 1.4 km
Tungsten Loop
Nederland, CO
0.9 mi 1.4 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
Minor Issues
Update
Mostly Dry
4 days ago
0.5 mi 0.7 km
Erie Forest
Erie, CO
0.5 mi 0.7 km Erie, CO
All Clear
Update
Dry: Good to go!
31 days ago
0.9 mi 1.5 km
Rock Creek Trail
Broomfield, CO
0.9 mi 1.5 km Broomfield, CO
Unknown
Update
2.3 mi 3.7 km
Foothills
Boulder, CO
2.3 mi 3.7 km Boulder, CO
Unknown
Update
Superior, CO
1.2 mi 1.9 km Superior, CO
All Clear
Update
Dry
28 days ago
2.8 mi 4.5 km
Coalton
Superior, CO
2.8 mi 4.5 km Superior, CO
All Clear
Update
Dry
28 days ago
1.9 mi 3.0 km
Sage
Gunbarrel, CO
1.9 mi 3.0 km Gunbarrel, CO
All Clear
Update
Some Mud
2 days ago
1.3 mi 2.1 km
Twin Lakes Loops
Gunbarrel, CO
1.3 mi 2.1 km Gunbarrel, CO
Unknown
Update
3.1 mi 4.9 km
Davidson Mesa Loop
Louisville, CO
3.1 mi 4.9 km Louisville, CO
Unknown
Update
Lyons, CO
2.0 mi 3.2 km Lyons, 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
All Clear
Update
63 days ago
1.2 mi 2.0 km
Dots Access Road
Nederland, CO
1.2 mi 2.0 km Nederland, CO
Unknown
Update
Gunbarrel, CO
2.1 mi 3.4 km Gunbarrel, CO
Unknown
Update
2.4 mi 3.8 km
355
Nederland, CO
2.4 mi 3.8 km Nederland, CO
Unknown
Update
1.2 mi 1.9 km
Kinnickinnick Loop
Nederland, CO
1.2 mi 1.9 km Nederland, 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
All Clear
Update
Some Mud
2 days ago
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