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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Building Map
Loading Map Data
Map Settings
Featured Ride
Trail
Featured Rides
Trails

Featured Rides: 22

7.4 mi 11.9 km
Betasso Preserve
Boulder, CO
7.4 mi 11.9 km Boulder, CO
All Clear
Update
Dry - So dry.
11 days ago
100 
11.8 mi 19.0 km
Hall Ranch
Lyons, CO
11.8 mi 19.0 km Lyons, CO
All Clear
Update
21 days ago
134 
7.8 mi 12.6 km
Walker Ranch
Coal Creek, CO
7.8 mi 12.6 km Coal Creek, CO
Minor Issues
Update
Some Mud
8 days ago
82 
7.9 mi 12.7 km
Heil Ranch
Lyons, CO
7.9 mi 12.7 km Lyons, CO
All Clear
Update
Dry
14 days ago
64 
15.2 mi 24.5 km
Dirty Bismarck
Superior, CO
15.2 mi 24.5 km Superior, CO
All Clear
Update
Dry
5 days ago
64 
Superior, CO
10.3 mi 16.6 km Superior, CO
All Clear
Update
Dry
5 days ago
36 
16.2 mi 26.1 km
Super Betasso
Boulder, CO
16.2 mi 26.1 km Boulder, CO
All Clear
Update
Dry
6 days ago
31 
6.9 mi 11.1 km
West Magnolia Tour
Nederland, CO
6.9 mi 11.1 km Nederland, CO
Unknown
Update
24 
Nederland, CO
16.3 mi 26.2 km Nederland, CO
Unknown
Update
14 
Lyons, CO
32.9 mi 53.0 km Lyons, CO
All Clear
Update
Dry, Mostly Dry
20 days ago
11 
Superior, CO
12.6 mi 20.2 km Superior, CO
All Clear
Update
Dry
5 days ago
18 
12.3 mi 19.7 km
Super Magic Bus
Nederland, CO
12.3 mi 19.7 km Nederland, CO
Unknown
Update
12 
Boulder, CO
2.0 mi 3.2 km Boulder, CO
Unknown
Update
Erie, CO
6.7 mi 10.8 km Erie, CO
Minor Issues
Update
Dry: 40+ mph winds
19 days ago
11 
Lyons, CO
14.6 mi 23.5 km Lyons, CO
Unknown
Update
28.4 mi 45.6 km
Super Walker
Boulder, CO
28.4 mi 45.6 km Boulder, CO
Unknown
Update
28.9 mi 46.6 km
Ned Bus Shuttle
Nederland, CO
28.9 mi 46.6 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
10.0 mi 16.0 km
Ride like a Moto
Niwot, CO
10.0 mi 16.0 km Niwot, CO
All Clear
Update
Dry
12 days ago
11.8 mi 18.9 km
Rock Creek Farm Loop
Broomfield, CO
11.8 mi 18.9 km Broomfield, CO
Minor Issues
Update
Trail seems to be fine, but always be prepared for mud. Stay safe guys
72 days ago
Nederland, CO
6.2 mi 9.9 km Nederland, CO
Minor Issues
Update
Snowy, Icy, Fallen Trees - Patches of snow and ice and downed trees throughout but fully rideable on a fattie with good tread up to the loop. Mille...
67 days ago
Boulder, CO
11.4 mi 18.4 km Boulder, CO
Unknown
Update

Trails: 105

5.3 mi 8.5 km
Picture Rock
Lyons, CO
5.3 mi 8.5 km Lyons, CO
All Clear
Update
Mostly Dry
6 days ago
53 
2.2 mi 3.6 km
Nelson Loop
Lyons, CO
2.2 mi 3.6 km Lyons, CO
All Clear
Update
Mostly Dry
22 days ago
26 
1.2 mi 1.9 km
Betasso Link Trail
Boulder, CO
1.2 mi 1.9 km Boulder, CO
All Clear
Update
Dry
15 days ago
32 
Lyons, CO
1.4 mi 2.2 km Lyons, CO
All Clear
Update
Mostly Dry
22 days ago
20 
2.3 mi 3.7 km
Benjamin Loop
Boulder, CO
2.3 mi 3.7 km Boulder, CO
All Clear
Update
Just a few puddles
1 day ago
18 
2.9 mi 4.7 km
Wild Turkey Trail
Lyons, CO
2.9 mi 4.7 km Lyons, CO
All Clear
Update
Dry
14 days ago
21 
Nederland, CO
6.0 mi 9.7 km Nederland, CO
Minor Issues
Update
Snowy - Snow on top of ice. Rideable just be aware Fat bike only
86 days ago
3.3 mi 5.3 km
Canyon Loop
Boulder, CO
3.3 mi 5.3 km Boulder, CO
All Clear
Update
Dry
10 days ago
18 
2.6 mi 4.1 km
Wapiti Trail
Lyons, CO
2.6 mi 4.1 km Lyons, CO
All Clear
Update
Dry
14 days ago
20 
3.2 mi 5.2 km
School Bus #929
Nederland, CO
3.2 mi 5.2 km Nederland, CO
Unknown
Update
Nederland, CO
5.9 mi 9.5 km Nederland, CO
Minor Issues
Update
Snowy - Still snowy up there, started firm early but became softer as things warmed up. Rideable to the creek crossing then deep and post holey
19 days ago
12 
Boulder, CO
0.6 mi 1.0 km Boulder, CO
Unknown
Update
2.7 mi 4.3 km
Ponderosa Loop
Lyons, CO
2.7 mi 4.3 km Lyons, CO
All Clear
Update
Dry
14 days ago
19 
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
0.1 mi 0.1 km
Medium Slopestyle
Boulder, CO
0.1 mi 0.1 km Boulder, CO
Unknown
Update
0.1 mi 0.2 km
Small Slopestyle
Boulder, CO
0.1 mi 0.2 km Boulder, CO
Unknown
Update
0.7 mi 1.0 km
Black Line
Erie, CO
0.7 mi 1.0 km Erie, CO
Minor Issues
Update
Dry: 40+ mph winds
19 days ago
0.1 mi 0.2 km
Large Slopestyle
Boulder, CO
0.1 mi 0.2 km Boulder, CO
Unknown
Update
1.8 mi 2.9 km
Re-Root #927
Nederland, CO
1.8 mi 2.9 km Nederland, CO
Unknown
Update
1.7 mi 2.8 km
Little Raven Trail
Nederland, CO
1.7 mi 2.8 km Nederland, CO
Bad / Closed
Update
Snowy - XC ski only during winter. Closed to fat bikers.
91 days ago
0.8 mi 1.3 km
Fourmile Link
Boulder, CO
0.8 mi 1.3 km Boulder, CO
Unknown
Update
0.1 mi 0.2 km
Corkscrew
Boulder, CO
0.1 mi 0.2 km Boulder, CO
Unknown
Update
Boulder, CO
1.9 mi 3.1 km Boulder, CO
All Clear
Update
Dry
13 days ago
13 
3.0 mi 4.8 km
Eagle Wind
Lyons, CO
3.0 mi 4.8 km Lyons, CO
All Clear
Update
Dry
27 days ago
12 
2.2 mi 3.5 km
Doudy Draw
Superior, CO
2.2 mi 3.5 km Superior, CO
All Clear
Update
Dry
5 days ago
14 
Superior, CO
1.4 mi 2.2 km Superior, CO
All Clear
Update
10 days ago
13 
0.9 mi 1.4 km
Sugar Magnolia #926
Nederland, CO
0.9 mi 1.4 km Nederland, CO
Unknown
Update
Nederland, CO
0.8 mi 1.3 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
Nederland, CO
2.9 mi 4.6 km Nederland, CO
Unknown
Update
11.4 mi 18.3 km
Coal Creek Trail
Superior, CO
11.4 mi 18.3 km Superior, CO
All Clear
Update
Mostly Dry
88 days ago
0.6 mi 0.9 km
Coal Seam
Superior, CO
0.6 mi 0.9 km Superior, CO
All Clear
Update
Dry
5 days ago
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
2.1 mi 3.4 km Superior, CO
Bad / Closed
Update
Muddy
27 days ago
12 
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
High Plains
Superior, CO
2.6 mi 4.2 km Superior, CO
All Clear
Update
Dry
44 days ago
0.9 mi 1.4 km
Marshall Valley
Superior, CO
0.9 mi 1.4 km Superior, CO
All Clear
Update
Dry
5 days ago
1.1 mi 1.7 km
Reboot
Nederland, CO
1.1 mi 1.7 km Nederland, CO
Unknown
Update
2.9 mi 4.7 km
Left Hand
Niwot, CO
2.9 mi 4.7 km Niwot, CO
All Clear
Update
Dry
12 days ago
3.7 mi 6.0 km
Community Ditch
Superior, CO
3.7 mi 6.0 km Superior, CO
All Clear
Update
Dry
5 days ago
13 
1.0 mi 1.6 km
Hobbit 3 #927
Nederland, CO
1.0 mi 1.6 km Nederland, CO
Unknown
Update
0.7 mi 1.2 km
Hobbit 2 #927
Nederland, CO
0.7 mi 1.2 km Nederland, CO
Unknown
Update
0.7 mi 1.2 km
Green Trail
Erie, CO
0.7 mi 1.2 km Erie, CO
Minor Issues
Update
Dry: 40+ mph winds
19 days ago
Lyons, CO
0.9 mi 1.5 km Lyons, CO
All Clear
Update
Dry
27 days ago
Coal Creek, CO
2.6 mi 4.2 km Coal Creek, CO
All Clear
Update
Dry
16 days ago
2.3 mi 3.6 km
Waldrop Trail
Nederland, CO
2.3 mi 3.6 km Nederland, CO
All Clear
Update
Snowy - Fat biking only.
91 days ago
Superior, CO
3.0 mi 4.8 km Superior, CO
All Clear
Update
Dry
5 days ago
1.1 mi 1.8 km
Prairie Vista
Superior, CO
1.1 mi 1.8 km Superior, CO
Bad / Closed
Update
Muddy
27 days ago
Gunbarrel, CO
2.1 mi 3.3 km Gunbarrel, CO
Unknown
Update
Niwot, CO
3.7 mi 6.0 km Niwot, CO
All Clear
Update
Dry
45 days ago
8.2 mi 13.3 km
Boulder Creek Path
Boulder, CO
8.2 mi 13.3 km Boulder, CO
Unknown
Update
Gunbarrel, CO
2.2 mi 3.5 km Gunbarrel, CO
All Clear
Update
Dry
45 days ago
3.2 mi 5.1 km
Eagle
Gunbarrel, CO
3.2 mi 5.1 km Gunbarrel, CO
All Clear
Update
Dry
12 days ago
2.1 mi 3.3 km
Interim Joder Trail
Niwot, CO
2.1 mi 3.3 km Niwot, CO
All Clear
Update
Dry
12 days ago
Coal Creek, CO
1.0 mi 1.7 km Coal Creek, CO
All Clear
Update
Dry
11 days ago
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
0.7 mi 1.1 km
Boot
Nederland, CO
0.7 mi 1.1 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
All Clear
Update
Dry
45 days ago
Nederland, CO
1.9 mi 3.1 km Nederland, CO
Minor Issues
Update
Snowy, Icy, Fallen Trees - Patches of snow and ice and downed trees throughout but fully rideable on a fattie with good tread up to the loop. Mille...
67 days ago
0.5 mi 0.9 km
Lookout Trail #926
Nederland, CO
0.5 mi 0.9 km Nederland, 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
1.1 mi 1.8 km
Hobbit 1 #927
Nederland, CO
1.1 mi 1.8 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
Dry
5 days ago
2.3 mi 3.8 km
Meadowlark
Superior, CO
2.3 mi 3.8 km Superior, CO
Unknown
Update
0.5 mi 0.8 km
Aspen Alley
Nederland, CO
0.5 mi 0.8 km Nederland, CO
Unknown
Update
0.5 mi 0.9 km
Sunset Ridge
Erie, CO
0.5 mi 0.9 km Erie, CO
Minor Issues
Update
Dry: 40+ mph winds
19 days ago
8.8 mi 14.2 km
Lake Link Trail
Broomfield, CO
8.8 mi 14.2 km Broomfield, CO
Unknown
Update
1.4 mi 2.3 km
Greenbelt Plateau
Superior, CO
1.4 mi 2.3 km Superior, CO
All Clear
Update
Dry
5 days ago
2.6 mi 4.2 km
Chapman Drive
Boulder, CO
2.6 mi 4.2 km Boulder, CO
Unknown
Update
Niwot, CO
2.9 mi 4.7 km Niwot, CO
Unknown
Update
Gunbarrel, CO
1.9 mi 3.1 km Gunbarrel, CO
All Clear
Update
Dry
45 days ago
Boulder, CO
3.4 mi 5.4 km Boulder, CO
All Clear
Update
Dry
68 days ago
1.3 mi 2.0 km
Cottontail Trail
Gunbarrel, CO
1.3 mi 2.0 km Gunbarrel, CO
All Clear
Update
Dry
45 days ago
0.5 mi 0.7 km
Erie Forest
Erie, CO
0.5 mi 0.7 km Erie, CO
Minor Issues
Update
Dry: 40+ mph winds
19 days ago
0.9 mi 1.5 km
Rock Creek Trail
Broomfield, CO
0.9 mi 1.5 km Broomfield, CO
Unknown
Update
0.7 mi 1.1 km
Blue Trail
Erie, CO
0.7 mi 1.1 km Erie, CO
Minor Issues
Update
Dry: 40+ mph winds
19 days ago
0.6 mi 1.0 km
Little Raven East
Nederland, CO
0.6 mi 1.0 km Nederland, CO
Unknown
Update
Superior, CO
1.2 mi 1.9 km Superior, CO
Bad / Closed
Update
Muddy
27 days ago
2.3 mi 3.7 km
Foothills
Boulder, CO
2.3 mi 3.7 km Boulder, CO
Unknown
Update
1.3 mi 2.1 km
Twin Lakes Loops
Gunbarrel, CO
1.3 mi 2.1 km Gunbarrel, CO
All Clear
Update
Dry
45 days ago
2.8 mi 4.5 km
Coalton
Superior, CO
2.8 mi 4.5 km Superior, CO
Unknown
Update
Lyons, CO
2.0 mi 3.2 km Lyons, CO
Unknown
Update
2.1 mi 3.3 km
CU South Campus
Boulder, CO
2.1 mi 3.3 km Boulder, 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
All Clear
Update
Dry
45 days ago
3.1 mi 4.9 km
Davidson Mesa Loop
Louisville, CO
3.1 mi 4.9 km Louisville, CO
Unknown
Update
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
0.9 mi 1.4 km
Tungsten Loop
Nederland, CO
0.9 mi 1.4 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
1.5 mi 2.5 km
CR 132 West
Nederland, CO
1.5 mi 2.5 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
1.9 mi 3.0 km
Sage
Gunbarrel, CO
1.9 mi 3.0 km Gunbarrel, CO
Unknown
Update
1.7 mi 2.7 km
Indian Mesa
Lyons, CO
1.7 mi 2.7 km Lyons, CO
All Clear
Update
Dry
27 days ago
1.6 mi 2.5 km
North Rim
Boulder, CO
1.6 mi 2.5 km Boulder, CO
Unknown
Update
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