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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: 23

7.4 mi 11.9 km
Betasso Preserve
Boulder, CO
7.4 mi 11.9 km Boulder, CO
All Clear
Update
Dry
1 day ago
147 
11.8 mi 18.9 km
Hall Ranch
Lyons, CO
11.8 mi 18.9 km Lyons, CO
All Clear
Update
Dry
3 days ago
175 
7.8 mi 12.6 km
Walker Ranch
Coal Creek, CO
7.8 mi 12.6 km Coal Creek, CO
Minor Issues
Update
Muddy: Just a little bit wet and muddy. I went CW and had no trouble with slickness. Might as well be all clear.
25 days ago
132 
7.9 mi 12.7 km
Heil Ranch
Lyons, CO
7.9 mi 12.7 km Lyons, CO
All Clear
Update
Dry
3 days ago
93 
15.7 mi 25.3 km
Dirty Bismark
Superior, CO
15.7 mi 25.3 km Superior, CO
All Clear
Update
Dry - Trail is in great shape.
4 days ago
106 
Superior, CO
10.3 mi 16.6 km Superior, CO
All Clear
Update
24 days ago
56 
16.2 mi 26.1 km
Super Betasso
Boulder, CO
16.2 mi 26.1 km Boulder, CO
All Clear
Update
Dry
1 day ago
37 
Lyons, CO
14.6 mi 23.5 km Lyons, CO
All Clear
Update
Dry
16 days ago
22 
7.1 mi 11.4 km
West Magnolia Tour
Nederland, CO
7.1 mi 11.4 km Nederland, CO
Minor Issues
Update
Fallen Trees - Just rode this last night before dusk! Clear trails for most of it, but a few trees were blown over into the trail.
53 days ago
39 
12.6 mi 20.2 km
Spring Brook Loop
Superior, CO
12.6 mi 20.2 km Superior, CO
All Clear
Update
Dry
23 days ago
39 
10.0 mi 16.0 km
Ride like a Moto
Niwot, CO
10.0 mi 16.0 km Niwot, CO
All Clear
Update
Dry - Dusty
4 days ago
13 
Nederland, CO
16.3 mi 26.2 km Nederland, CO
Minor Issues
Update
Snowy, Icy, Fallen Trees
1 day ago
26 
Lyons, CO
32.9 mi 53.0 km Lyons, CO
All Clear
Update
Dry
3 days ago
16 
12.3 mi 19.8 km
Super Magic Bus
Nederland, CO
12.3 mi 19.8 km Nederland, CO
All Clear
Update
Snowy: Either dry or frozen. Good riding!
2 days ago
30 
10.9 mi 17.6 km
Rhythm & Blues
Nederland, CO
10.9 mi 17.6 km Nederland, CO
All Clear
Update
Snowy: Either frozen or dry, good riding!
2 days ago
Boulder, CO
2.0 mi 3.2 km Boulder, CO
All Clear
Update
Dry - Dry!
14 days ago
14 
Erie, CO
6.7 mi 10.8 km Erie, CO
All Clear
Update
32 days ago
17 
Boulder, CO
71.9 mi 115.7 km Boulder, CO
Minor Issues
Update
Snowy: Ride your fat bike, otherwise run tubeless at a low psi for any hope of sufficient traction
23 days ago
Nederland, CO
6.2 mi 9.9 km Nederland, CO
Unknown
Update
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
10 
Nederland, CO
5.8 mi 9.3 km Nederland, CO
Unknown
Update
Boulder, CO
11.4 mi 18.4 km Boulder, CO
All Clear
Update
Dry
61 days ago

Trails: 109

5.3 mi 8.5 km
Picture Rock
Lyons, CO
5.3 mi 8.5 km Lyons, CO
All Clear
Update
Dry
3 days ago
70 
Lyons, CO
2.5 mi 4.0 km Lyons, CO
All Clear
Update
Dry
24 days ago
49 
2.2 mi 3.6 km
Nelson Loop
Lyons, CO
2.2 mi 3.6 km Lyons, CO
All Clear
Update
Mostly Dry, Some Mud - Here dirt conditions yesterday!
21 days ago
34 
1.2 mi 1.9 km
Betasso Link Trail
Boulder, CO
1.2 mi 1.9 km Boulder, CO
All Clear
Update
Dry
1 day ago
42 
2.3 mi 3.7 km
Benjamin Loop
Boulder, CO
2.3 mi 3.7 km Boulder, CO
All Clear
Update
Dry
1 day ago
24 
Lyons, CO
1.4 mi 2.2 km Lyons, CO
All Clear
Update
Dry
24 days ago
26 
Nederland, CO
6.0 mi 9.7 km Nederland, CO
Unknown
Update
10 
0.1 mi 0.2 km
XL Slopestyle
Boulder, CO
0.1 mi 0.2 km Boulder, CO
Unknown
Update
0.1 mi 0.2 km
Dual Slalom
Boulder, CO
0.1 mi 0.2 km Boulder, CO
Unknown
Update
Boulder, CO
0.6 mi 1.0 km Boulder, CO
Unknown
Update
0.1 mi 0.1 km
Medium Slopestyle
Boulder, CO
0.1 mi 0.1 km Boulder, CO
Unknown
Update
3.3 mi 5.3 km
Canyon Loop
Boulder, CO
3.3 mi 5.3 km Boulder, CO
All Clear
Update
Dry
1 day ago
26 
2.9 mi 4.7 km
Wild Turkey Trail
Lyons, CO
2.9 mi 4.7 km Lyons, CO
All Clear
Update
Dry
3 days ago
28 
0.1 mi 0.2 km
Corkscrew
Boulder, CO
0.1 mi 0.2 km Boulder, CO
Unknown
Update
0.1 mi 0.2 km
Large Slopestyle
Boulder, CO
0.1 mi 0.2 km Boulder, CO
Unknown
Update
0.9 mi 1.5 km
Antelope Trail
Lyons, CO
0.9 mi 1.5 km Lyons, CO
All Clear
Update
Mostly Dry, Some Mud - Here dirt conditions yesterday!
21 days ago
24 
Nederland, CO
5.9 mi 9.5 km Nederland, CO
Unknown
Update
20 
3.2 mi 5.2 km
School Bus #929
Nederland, CO
3.2 mi 5.2 km Nederland, CO
Minor Issues
Update
Snowy - 70% packed snow, it’s rideable but slower
1 day ago
14 
0.7 mi 1.0 km
Black Line
Erie, CO
0.7 mi 1.0 km Erie, CO
All Clear
Update
32 days ago
Nederland, CO
0.9 mi 1.5 km Nederland, CO
All Clear
Update
Dry, Mostly Dry - Good to go
1 day ago
2.7 mi 4.3 km
Ponderosa Loop
Lyons, CO
2.7 mi 4.3 km Lyons, CO
All Clear
Update
Dry
3 days ago
26 
2.6 mi 4.1 km
Wapiti Trail
Lyons, CO
2.6 mi 4.1 km Lyons, CO
All Clear
Update
Dry
3 days ago
27 
Nederland, CO
0.5 mi 0.8 km Nederland, CO
All Clear
Update
Dry, Mostly Dry - Good to go
1 day ago
0.1 mi 0.2 km
Small Slopestyle
Boulder, CO
0.1 mi 0.2 km Boulder, CO
Unknown
Update
1.7 mi 2.8 km
Little Raven Trail
Nederland, CO
1.7 mi 2.8 km Nederland, CO
Unknown
Update
0.8 mi 1.3 km
Fourmile Link
Boulder, CO
0.8 mi 1.3 km Boulder, CO
All Clear
Update
Dry - Trail is fast
4 days ago
13 
0.9 mi 1.5 km
Sugar Magnolia #926
Nederland, CO
0.9 mi 1.5 km Nederland, CO
All Clear
Update
Mostly Dry - Tiny bit of snow and ice
1 day ago
3.0 mi 4.8 km
Eagle Wind
Lyons, CO
3.0 mi 4.8 km Lyons, CO
Unknown
Update
19 
1.4 mi 2.3 km
Re-Root #927
Nederland, CO
1.4 mi 2.3 km Nederland, CO
Minor Issues
Update
Fallen Trees - High winds in the area have knocked trees down blocking multiple sections of trail. Dismount and walk as needed.
40 days ago
11 
0.7 mi 1.2 km
Green Trail
Erie, CO
0.7 mi 1.2 km Erie, CO
All Clear
Update
32 days ago
11 
Boulder, CO
1.9 mi 3.1 km Boulder, CO
All Clear
Update
Muddy
80 days ago
17 
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
Unknown
Update
0.4 mi 0.6 km
Hotlap
Boulder, CO
0.4 mi 0.6 km Boulder, CO
Unknown
Update
Superior, CO
1.4 mi 2.2 km Superior, CO
All Clear
Update
Muddy
80 days ago
17 
0.7 mi 1.1 km
Blue Trail
Erie, CO
0.7 mi 1.1 km Erie, CO
All Clear
Update
32 days ago
10 
0.6 mi 0.9 km
Coal Seam
Superior, CO
0.6 mi 0.9 km Superior, CO
All Clear
Update
Dry - bone dry
41 days ago
11.4 mi 18.3 km
Coal Creek Trail
Superior, CO
11.4 mi 18.3 km Superior, CO
All Clear
Update
24 days ago
2.2 mi 3.5 km
Doudy Draw
Superior, CO
2.2 mi 3.5 km Superior, CO
All Clear
Update
Dry
23 days ago
16 
Nederland, CO
2.9 mi 4.6 km Nederland, CO
Unknown
Update
1.1 mi 1.7 km
Reboot
Nederland, CO
1.1 mi 1.7 km Nederland, CO
All Clear
Update
Dry
88 days ago
Superior, CO
2.1 mi 3.4 km Superior, CO
All Clear
Update
Muddy
80 days ago
16 
0.7 mi 1.1 km
Boot
Nederland, CO
0.7 mi 1.1 km Nederland, CO
All Clear
Update
Dry
88 days ago
Nederland, CO
1.9 mi 3.1 km Nederland, CO
Unknown
Update
Coal Creek, CO
2.6 mi 4.2 km Coal Creek, CO
All Clear
Update
Dry - Really dry, loose dirt over hard pack. watch out for the turns, not much grip. Cold and windy today.
54 days ago
2.3 mi 3.7 km
Wapiti Trail
Nederland, CO
2.3 mi 3.7 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
All Clear
Update
Dry
46 days ago
Coal Creek, CO
1.0 mi 1.7 km Coal Creek, CO
All Clear
Update
Dry - Really dry, loose dirt over hard pack. watch out for the turns, not much grip. Cold and windy today.
54 days ago
1.0 mi 1.6 km
Hobbit 3 #927
Nederland, CO
1.0 mi 1.6 km Nederland, CO
All Clear
Update
Dry, Mostly Dry - Good to go
1 day ago
0.9 mi 1.4 km
Marshall Valley
Superior, CO
0.9 mi 1.4 km Superior, CO
All Clear
Update
Muddy
80 days ago
2.7 mi 4.4 km
High Plains
Superior, CO
2.7 mi 4.4 km Superior, CO
All Clear
Update
24 days ago
2.9 mi 4.7 km
Left Hand
Niwot, CO
2.9 mi 4.7 km Niwot, CO
Unknown
Update
1.1 mi 1.8 km
Prairie Vista
Superior, CO
1.1 mi 1.8 km Superior, CO
All Clear
Update
Muddy
80 days ago
0.7 mi 1.2 km
Hobbit 2 #927
Nederland, CO
0.7 mi 1.2 km Nederland, CO
All Clear
Update
Dry, Mostly Dry - Good to go
1 day ago
Superior, CO
3.0 mi 4.8 km Superior, CO
All Clear
Update
Muddy
80 days ago
Niwot, CO
3.7 mi 6.0 km Niwot, CO
Unknown
Update
Gunbarrel, CO
2.1 mi 3.3 km Gunbarrel, CO
Unknown
Update
Gunbarrel, CO
2.2 mi 3.5 km Gunbarrel, 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
Unknown
Update
0.2 mi 0.3 km
Skillz Loop
Boulder, CO
0.2 mi 0.3 km Boulder, CO
Unknown
Update
Nederland, CO
0.8 mi 1.3 km Nederland, CO
All Clear
Update
Dry, Mostly Dry - Good to go
1 day ago
3.7 mi 6.0 km
Community Ditch
Superior, CO
3.7 mi 6.0 km Superior, CO
All Clear
Update
Dry
23 days ago
14 
3.2 mi 5.1 km
Eagle
Gunbarrel, CO
3.2 mi 5.1 km Gunbarrel, CO
All Clear
Update
Dry
1 day ago
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
32 days ago
2.3 mi 3.6 km
Waldrop Trail
Nederland, CO
2.3 mi 3.6 km Nederland, CO
Unknown
Update
0.7 mi 1.1 km
Lookout Trail #926
Nederland, CO
0.7 mi 1.1 km Nederland, 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
Dry
1 day ago
1.4 mi 2.3 km
Greenbelt Plateau
Superior, CO
1.4 mi 2.3 km Superior, CO
All Clear
Update
Dry
23 days ago
8.8 mi 14.2 km
Lake Link Trail
Broomfield, CO
8.8 mi 14.2 km Broomfield, CO
Unknown
Update
2.3 mi 3.8 km
Meadowlark
Superior, CO
2.3 mi 3.8 km Superior, CO
All Clear
Update
24 days ago
0.6 mi 1.0 km
Little Raven East
Nederland, CO
0.6 mi 1.0 km Nederland, CO
Unknown
Update
1.2 mi 2.0 km
Hobbit 1 #927
Nederland, CO
1.2 mi 2.0 km Nederland, CO
Minor Issues
Update
Mostly Dry - Some packed snow
1 day ago
0.8 mi 1.3 km
Cowdrey Draw
Superior, CO
0.8 mi 1.3 km Superior, CO
All Clear
Update
Muddy
80 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
All Clear
Update
Muddy
80 days ago
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
All Clear
Update
Dry
95 days ago
2.6 mi 4.2 km
Chapman Drive
Boulder, CO
2.6 mi 4.2 km Boulder, CO
All Clear
Update
Dry
61 days ago
0.5 mi 0.7 km
Erie Forest
Erie, CO
0.5 mi 0.7 km Erie, CO
All Clear
Update
32 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
Muddy
80 days ago
1.9 mi 3.0 km
Sage
Gunbarrel, CO
1.9 mi 3.0 km Gunbarrel, CO
All Clear
Update
Dry
1 day 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
Bad / Closed
Update
closed since 2013 floods
18 days ago
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
All Clear
Update
Muddy
80 days ago
3.6 mi 5.7 km
Boulder Reservoir
Gunbarrel, CO
3.6 mi 5.7 km Gunbarrel, CO
Unknown
Update
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
All Clear
Update
Dry - Dry!
14 days ago
1.5 mi 2.5 km
CR 132 West
Nederland, CO
1.5 mi 2.5 km Nederland, CO
Unknown
Update
2.8 mi 4.5 km
Coalton
Superior, CO
2.8 mi 4.5 km Superior, CO
All Clear
Update
24 days ago
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
Dry
1 day ago
1.5 mi 2.4 km
355D
Nederland, CO
1.5 mi 2.4 km Nederland, 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