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
3 days ago
137 
11.8 mi 18.9 km
Hall Ranch
Lyons, CO
11.8 mi 18.9 km Lyons, CO
Minor Issues
Update
Mostly Dry - only a few puddles here and there
2 days ago
164 
7.8 mi 12.6 km
Walker Ranch
Coal Creek, CO
7.8 mi 12.6 km Coal Creek, CO
All Clear
Update
19 hours ago
123 
15.2 mi 24.5 km
Dirty Bismark
Superior, CO
15.2 mi 24.5 km Superior, CO
All Clear
Update
Muddy
22 days ago
98 
7.9 mi 12.7 km
Heil Ranch
Lyons, CO
7.9 mi 12.7 km Lyons, CO
All Clear
Update
Dry
8 days ago
85 
Superior, CO
10.3 mi 16.6 km Superior, CO
All Clear
Update
Muddy
22 days ago
54 
16.2 mi 26.1 km
Super Betasso
Boulder, CO
16.2 mi 26.1 km Boulder, CO
All Clear
Update
Dry
3 days ago
36 
7.1 mi 11.4 km
West Magnolia Tour
Nederland, CO
7.1 mi 11.4 km Nederland, CO
Minor Issues
Update
Mostly Dry: Look for construction workers and equipment on sections of this trail and adjoining trails.
16 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
Muddy
22 days ago
36 
Lyons, CO
14.6 mi 23.5 km Lyons, CO
Bad / Closed
Update
Currently closed
5 days ago
18 
Nederland, CO
16.3 mi 26.2 km Nederland, CO
All Clear
Update
Mostly Dry, Fallen Trees
63 days ago
25 
10.0 mi 16.0 km
Ride like a Moto
Niwot, CO
10.0 mi 16.0 km Niwot, CO
Unknown
Update
10 
Lyons, CO
32.9 mi 53.0 km Lyons, CO
Bad / Closed
Update
Muddy
12 days ago
15 
12.3 mi 19.8 km
Super Magic Bus
Nederland, CO
12.3 mi 19.8 km Nederland, CO
Minor Issues
Update
Mostly Dry: Look for construction workers and equipment on sections of this trail and adjoining trails.
16 days ago
28 
10.9 mi 17.6 km
Rhythm & Blues
Nederland, CO
10.9 mi 17.6 km Nederland, CO
Minor Issues
Update
Mostly Dry: Aspen Alley is running a little wet currently, but otherwise the trails are dry and in great shape! Pungy is super tacky.
7 days ago
Boulder, CO
2.0 mi 3.2 km Boulder, CO
Unknown
Update
14 
Erie, CO
6.7 mi 10.8 km Erie, CO
All Clear
Update
3 days ago
16 
Nederland, CO
6.2 mi 9.9 km Nederland, CO
All Clear
Update
Perfect!!
96 days ago
12.2 mi 19.6 km
East Boulder Trail
Gunbarrel, CO
12.2 mi 19.6 km Gunbarrel, CO
Minor Issues
Update
there is a bridge closed due to damage from the floods, but local residents hop over and seem to trust the bridge
56 days ago
Boulder, CO
72.0 mi 115.9 km Boulder, CO
All Clear
Update
Dry: Completely dry.
24 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
Dry
75 days ago
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
3 days ago

Trails: 108

5.3 mi 8.5 km
Picture Rock
Lyons, CO
5.3 mi 8.5 km Lyons, CO
All Clear
Update
Mostly Dry - Hall Ranch is good to go, and might be the best trail on the front range.
4 days ago
67 
Lyons, CO
2.5 mi 4.0 km Lyons, CO
All Clear
Update
Mostly Dry - Hall Ranch is good to go, and might be the best trail on the front range.
4 days ago
46 
2.2 mi 3.6 km
Nelson Loop
Lyons, CO
2.2 mi 3.6 km Lyons, CO
All Clear
Update
Mostly Dry - Hall Ranch is good to go, and might be the best trail on the front range.
4 days ago
33 
1.2 mi 1.9 km
Betasso Link Trail
Boulder, CO
1.2 mi 1.9 km Boulder, CO
All Clear
Update
Dry
3 days ago
38 
2.3 mi 3.7 km
Benjamin Loop
Boulder, CO
2.3 mi 3.7 km Boulder, CO
All Clear
Update
Dry
3 days ago
24 
Lyons, CO
1.4 mi 2.2 km Lyons, CO
All Clear
Update
Mostly Dry - Dirt is great, just a few damp spots but no mud
17 days ago
26 
Nederland, CO
6.0 mi 9.7 km Nederland, CO
All Clear
Update
Mostly Dry, Fallen Trees
63 days ago
10 
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 0.2 km
XL Slopestyle
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
3.3 mi 5.3 km
Canyon Loop
Boulder, CO
3.3 mi 5.3 km Boulder, CO
All Clear
Update
Dry
3 days ago
24 
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
2.9 mi 4.7 km
Wild Turkey Trail
Lyons, CO
2.9 mi 4.7 km Lyons, CO
All Clear
Update
Dry
30 days ago
26 
0.9 mi 1.5 km
Antelope Trail
Lyons, CO
0.9 mi 1.5 km Lyons, CO
All Clear
Update
Mostly Dry: a bit of mud in some of the drainage areas.
8 days ago
22 
Nederland, CO
5.9 mi 9.5 km Nederland, CO
All Clear
Update
Dry - Most of the fallen trees are gone. A few that have always been there still remain and all but one maybe can be ridden over. All of the snow i...
98 days ago
20 
3.2 mi 5.2 km
School Bus #929
Nederland, CO
3.2 mi 5.2 km Nederland, CO
Minor Issues
Update
Mostly Dry: Look for construction workers and equipment on sections of this trail and adjoining trails.
16 days ago
14 
0.7 mi 1.0 km
Black Line
Erie, CO
0.7 mi 1.0 km Erie, CO
All Clear
Update
3 days ago
2.7 mi 4.3 km
Ponderosa Loop
Lyons, CO
2.7 mi 4.3 km Lyons, CO
All Clear
Update
Dry
8 days ago
25 
0.1 mi 0.2 km
Small Slopestyle
Boulder, CO
0.1 mi 0.2 km Boulder, CO
Unknown
Update
Nederland, CO
0.5 mi 0.8 km Nederland, CO
Minor Issues
Update
Mostly Dry: Look for construction workers and equipment on sections of this trail and adjoining trails.
16 days ago
2.6 mi 4.1 km
Wapiti Trail
Lyons, CO
2.6 mi 4.1 km Lyons, CO
All Clear
Update
Dry
4 days ago
25 
Nederland, CO
0.9 mi 1.5 km Nederland, CO
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
71 days ago
1.7 mi 2.8 km
Little Raven Trail
Nederland, CO
1.7 mi 2.8 km Nederland, CO
All Clear
Update
Mostly Dry, Fallen Trees
63 days ago
0.9 mi 1.5 km
Sugar Magnolia #926
Nederland, CO
0.9 mi 1.5 km Nederland, CO
Minor Issues
Update
Mostly Dry: Look for construction workers and equipment on sections of this trail and adjoining trails.
16 days ago
0.8 mi 1.3 km
Fourmile Link
Boulder, CO
0.8 mi 1.3 km Boulder, CO
All Clear
Update
Dry
3 days ago
12 
3.0 mi 4.8 km
Eagle Wind
Lyons, CO
3.0 mi 4.8 km Lyons, CO
All Clear
Update
Dry - Watch out for rattle snakes. All clear
60 days ago
19 
1.4 mi 2.3 km
Re-Root #927
Nederland, CO
1.4 mi 2.3 km Nederland, CO
Minor Issues
Update
Dry - This trail has a permanently closed(private property signs) small section from the starting point shown on MTBP to where the intersection with the county road(yellow)
45 days ago
11 
0.7 mi 1.2 km
Green Trail
Erie, CO
0.7 mi 1.2 km Erie, CO
All Clear
Update
3 days ago
11 
Boulder, CO
1.9 mi 3.1 km Boulder, CO
All Clear
Update
Muddy
22 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
0.7 mi 1.1 km
Blue Trail
Erie, CO
0.7 mi 1.1 km Erie, CO
All Clear
Update
3 days ago
10 
Superior, CO
1.4 mi 2.2 km Superior, CO
All Clear
Update
Muddy
22 days ago
16 
0.6 mi 0.9 km
Coal Seam
Superior, CO
0.6 mi 0.9 km Superior, CO
All Clear
Update
Muddy
22 days ago
11.4 mi 18.3 km
Coal Creek Trail
Superior, CO
11.4 mi 18.3 km Superior, CO
Unknown
Update
2.2 mi 3.5 km
Doudy Draw
Superior, CO
2.2 mi 3.5 km Superior, CO
All Clear
Update
Muddy
22 days ago
16 
Nederland, CO
2.9 mi 4.6 km Nederland, CO
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
71 days ago
1.1 mi 1.7 km
Reboot
Nederland, CO
1.1 mi 1.7 km Nederland, CO
All Clear
Update
Dry
30 days ago
Superior, CO
2.1 mi 3.4 km Superior, CO
All Clear
Update
Muddy
22 days ago
16 
Nederland, CO
1.9 mi 3.1 km Nederland, CO
All Clear
Update
Perfect!!
96 days ago
0.7 mi 1.1 km
Boot
Nederland, CO
0.7 mi 1.1 km Nederland, CO
All Clear
Update
Dry
30 days ago
Coal Creek, CO
2.6 mi 4.2 km Coal Creek, CO
Minor Issues
Update
Some Mud
70 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
Unknown
Update
1.0 mi 1.6 km
Hobbit 3 #927
Nederland, CO
1.0 mi 1.6 km Nederland, CO
All Clear
Update
Dry
30 days ago
0.9 mi 1.4 km
Marshall Valley
Superior, CO
0.9 mi 1.4 km Superior, CO
All Clear
Update
Muddy
22 days ago
2.6 mi 4.2 km
High Plains
Superior, CO
2.6 mi 4.2 km Superior, CO
All Clear
Update
Muddy
22 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
22 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
30 days ago
Superior, CO
3.0 mi 4.8 km Superior, CO
All Clear
Update
Muddy
22 days ago
Niwot, CO
3.7 mi 6.0 km Niwot, CO
Unknown
Update
Coal Creek, CO
1.0 mi 1.7 km Coal Creek, CO
All Clear
Update
99 days ago
Gunbarrel, CO
2.1 mi 3.3 km Gunbarrel, CO
Bad / Closed
Update
Had to turn around
56 days ago
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
3.7 mi 6.0 km
Community Ditch
Superior, CO
3.7 mi 6.0 km Superior, CO
All Clear
Update
Muddy
22 days ago
14 
3.2 mi 5.1 km
Eagle
Gunbarrel, CO
3.2 mi 5.1 km Gunbarrel, CO
Unknown
Update
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
3 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
Minor Issues
Update
Dry - This trail has been re-routed
45 days ago
8.2 mi 13.3 km
Boulder Creek Path
Boulder, CO
8.2 mi 13.3 km Boulder, CO
All Clear
Update
Dry
3 days ago
1.4 mi 2.3 km
Greenbelt Plateau
Superior, CO
1.4 mi 2.3 km Superior, CO
All Clear
Update
Muddy
22 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
Unknown
Update
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
All Clear
Update
Dry
30 days ago
0.8 mi 1.3 km
Cowdrey Draw
Superior, CO
0.8 mi 1.3 km Superior, CO
All Clear
Update
Muddy
22 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
22 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
36 days ago
2.6 mi 4.2 km
Chapman Drive
Boulder, CO
2.6 mi 4.2 km Boulder, CO
All Clear
Update
Dry
3 days ago
0.9 mi 1.5 km
Rock Creek Trail
Broomfield, CO
0.9 mi 1.5 km Broomfield, CO
All Clear
Update
Dry
75 days ago
0.5 mi 0.7 km
Erie Forest
Erie, CO
0.5 mi 0.7 km Erie, CO
All Clear
Update
3 days ago
2.3 mi 3.7 km
Foothills
Boulder, CO
2.3 mi 3.7 km Boulder, CO
Minor Issues
Update
Some Mud
70 days ago
Superior, CO
1.2 mi 1.9 km Superior, CO
All Clear
Update
Muddy
22 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
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
All Clear
Update
Muddy
22 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
2.4 mi 3.8 km
355
Nederland, CO
2.4 mi 3.8 km Nederland, CO
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
71 days ago
Gunbarrel, CO
2.1 mi 3.4 km Gunbarrel, CO
All Clear
Update
91 days ago
1.2 mi 1.9 km
Kinnickinnick Loop
Nederland, CO
1.2 mi 1.9 km Nederland, CO
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
71 days ago
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
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
71 days ago
2.8 mi 4.5 km
Coalton
Superior, CO
2.8 mi 4.5 km Superior, 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
1.5 mi 2.4 km
355D
Nederland, CO
1.5 mi 2.4 km Nederland, CO
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
71 days ago
0.9 mi 1.5 km
355C
Nederland, CO
0.9 mi 1.5 km Nederland, CO
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
71 days ago
0.4 mi 0.6 km
355T
Nederland, CO
0.4 mi 0.6 km Nederland, CO
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
71 days ago