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: 20

7.4 mi 11.9 km
Betasso Preserve
Boulder, CO
7.4 mi 11.9 km Boulder, CO
All Clear
Update
Dry
13 hours ago
128 
11.8 mi 18.9 km
Hall Ranch
Lyons, CO
11.8 mi 18.9 km Lyons, CO
All Clear
Update
47 days ago
156 
7.8 mi 12.6 km
Walker Ranch
Coal Creek, CO
7.8 mi 12.6 km Coal Creek, CO
All Clear
Update
Some Mud - A few mud patches in forest areas but nothing that'll ruin the ride.
7 days ago
115 
Superior, CO
10.3 mi 16.6 km Superior, CO
All Clear
Update
Dry
20 days ago
50 
7.9 mi 12.7 km
Heil Ranch
Lyons, CO
7.9 mi 12.7 km Lyons, CO
All Clear
Update
Dry: One downed 10" diameter pine on the east half of the Ponderosa Loop. Easy to hop over or dismount if needed.
20 days ago
81 
15.2 mi 24.5 km
Dirty Bismark
Superior, CO
15.2 mi 24.5 km Superior, CO
All Clear
Update
Mostly Dry
14 days ago
90 
6.9 mi 11.1 km
West Magnolia Tour
Nederland, CO
6.9 mi 11.1 km Nederland, CO
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
14 days ago
34 
16.2 mi 26.1 km
Super Betasso
Boulder, CO
16.2 mi 26.1 km Boulder, CO
All Clear
Update
Dry - riding great, get out there!
7 days ago
33 
12.6 mi 20.2 km
Spring Brook Loop
Superior, CO
12.6 mi 20.2 km Superior, CO
All Clear
Update
Mostly Dry, Some Mud - Some isolated puddles, but mostly dry. most of mud is along the Community Ditch Trail, but isn't terrible.
5 days ago
34 
12.3 mi 19.7 km
Super Magic Bus
Nederland, CO
12.3 mi 19.7 km Nederland, CO
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
14 days ago
25 
Nederland, CO
16.3 mi 26.2 km Nederland, CO
All Clear
Update
Mostly Dry, Fallen Trees
7 days ago
21 
Lyons, CO
32.9 mi 53.0 km Lyons, CO
All Clear
Update
Mud all dried up now, trail is rideable all 33 miles
63 days ago
15 
10.0 mi 16.0 km
Ride like a Moto
Niwot, CO
10.0 mi 16.0 km Niwot, CO
All Clear
Update
Dry
77 days ago
Lyons, CO
14.6 mi 23.5 km Lyons, CO
All Clear
Update
Dry
1 day ago
13 
Boulder, CO
2.0 mi 3.2 km Boulder, CO
Unknown
Update
13 
Erie, CO
6.7 mi 10.8 km Erie, CO
All Clear
Update
5 days ago
15 
Nederland, CO
6.2 mi 9.9 km Nederland, CO
All Clear
Update
Perfect!!
39 days ago
12.2 mi 19.6 km
East Boulder Trail
Gunbarrel, CO
12.2 mi 19.6 km Gunbarrel, CO
Minor Issues
Update
Bridge out at ~3 miles
4 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
18 days ago
Boulder, CO
11.4 mi 18.4 km Boulder, CO
Minor Issues
Update
Some Mud
13 days ago

Trails: 107

5.3 mi 8.5 km
Picture Rock
Lyons, CO
5.3 mi 8.5 km Lyons, CO
All Clear
Update
Dry
1 day ago
63 
Lyons, CO
2.5 mi 4.0 km Lyons, CO
All Clear
Update
47 days ago
43 
2.2 mi 3.6 km
Nelson Loop
Lyons, CO
2.2 mi 3.6 km Lyons, CO
All Clear
Update
47 days ago
31 
1.2 mi 1.9 km
Betasso Link Trail
Boulder, CO
1.2 mi 1.9 km Boulder, CO
All Clear
Update
Dry
13 hours ago
35 
2.3 mi 3.7 km
Benjamin Loop
Boulder, CO
2.3 mi 3.7 km Boulder, CO
Minor Issues
Update
Some Mud
13 days ago
24 
Lyons, CO
1.4 mi 2.2 km Lyons, CO
All Clear
Update
47 days ago
24 
3.3 mi 5.3 km
Canyon Loop
Boulder, CO
3.3 mi 5.3 km Boulder, CO
Minor Issues
Update
Some Mud
13 days ago
24 
2.9 mi 4.7 km
Wild Turkey Trail
Lyons, CO
2.9 mi 4.7 km Lyons, CO
All Clear
Update
Dry: All dry, even the first rocky creek-crossing. No puddles.
59 days ago
26 
2.7 mi 4.3 km
Ponderosa Loop
Lyons, CO
2.7 mi 4.3 km Lyons, CO
All Clear
Update
Dry: One downed 10" diameter pine on the east half of the Ponderosa Loop. Easy to hop over or dismount if needed.
20 days ago
25 
Nederland, CO
6.0 mi 9.7 km Nederland, CO
All Clear
Update
Mostly Dry, Fallen Trees
7 days ago
10 
0.9 mi 1.5 km
Antelope Trail
Lyons, CO
0.9 mi 1.5 km Lyons, CO
All Clear
Update
Dry - Heavy use on this Fourth of July weekend!
48 days ago
20 
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...
41 days ago
15 
2.6 mi 4.1 km
Wapiti Trail
Lyons, CO
2.6 mi 4.1 km Lyons, CO
All Clear
Update
Dry: One downed 10" diameter pine on the east half of the Ponderosa Loop. Easy to hop over or dismount if needed.
20 days ago
23 
3.2 mi 5.2 km
School Bus #929
Nederland, CO
3.2 mi 5.2 km Nederland, CO
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
14 days ago
12 
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 0.2 km
Dual Slalom
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
79 days ago
17 
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
3 days ago
17 
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
All Clear
Update
10 days ago
0.8 mi 1.3 km
Fourmile Link
Boulder, CO
0.8 mi 1.3 km Boulder, CO
Minor Issues
Update
Some Mud
13 days ago
12 
0.1 mi 0.2 km
Large Slopestyle
Boulder, CO
0.1 mi 0.2 km Boulder, CO
Unknown
Update
0.1 mi 0.2 km
Corkscrew
Boulder, CO
0.1 mi 0.2 km Boulder, CO
Unknown
Update
Superior, CO
1.4 mi 2.2 km Superior, CO
All Clear
Update
64 days ago
16 
1.8 mi 2.9 km
Re-Root #927
Nederland, CO
1.8 mi 2.9 km Nederland, CO
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
14 days ago
11 
2.2 mi 3.5 km
Doudy Draw
Superior, CO
2.2 mi 3.5 km Superior, CO
All Clear
Update
Dry
20 days ago
16 
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
7 days ago
0.7 mi 1.2 km
Green Trail
Erie, CO
0.7 mi 1.2 km Erie, CO
All Clear
Update
10 days ago
10 
Superior, CO
2.1 mi 3.4 km Superior, CO
All Clear
Update
Dry
63 days ago
15 
11.4 mi 18.3 km
Coal Creek Trail
Superior, CO
11.4 mi 18.3 km Superior, CO
Unknown
Update
0.9 mi 1.4 km
Sugar Magnolia #926
Nederland, CO
0.9 mi 1.4 km Nederland, CO
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
14 days ago
0.6 mi 0.9 km
Coal Seam
Superior, CO
0.6 mi 0.9 km Superior, CO
All Clear
Update
22 days ago
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
59 days ago
0.7 mi 1.1 km
Blue Trail
Erie, CO
0.7 mi 1.1 km Erie, CO
All Clear
Update
10 days ago
Nederland, CO
0.8 mi 1.3 km Nederland, CO
All Clear
Update
Dry
59 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
Nederland, CO
2.9 mi 4.6 km Nederland, CO
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
14 days ago
Coal Creek, CO
2.6 mi 4.2 km Coal Creek, CO
Minor Issues
Update
Some Mud
13 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
21 days ago
2.6 mi 4.2 km
High Plains
Superior, CO
2.6 mi 4.2 km Superior, CO
All Clear
Update
48 days ago
1.0 mi 1.6 km
Hobbit 3 #927
Nederland, CO
1.0 mi 1.6 km Nederland, CO
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
14 days ago
Nederland, CO
1.9 mi 3.1 km Nederland, CO
All Clear
Update
Perfect!!
39 days ago
2.3 mi 3.7 km
Wapiti Trail
Nederland, CO
2.3 mi 3.7 km Nederland, CO
Minor Issues
Update
Fallen Trees: Quite a few downed trees in the way.
48 days ago
0.7 mi 1.2 km
Hobbit 2 #927
Nederland, CO
0.7 mi 1.2 km Nederland, CO
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
14 days ago
1.1 mi 1.7 km
Reboot
Nederland, CO
1.1 mi 1.7 km Nederland, CO
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
14 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
21 days ago
14 
2.9 mi 4.7 km
Left Hand
Niwot, CO
2.9 mi 4.7 km Niwot, CO
All Clear
Update
Dry
77 days ago
Superior, CO
3.0 mi 4.8 km Superior, CO
All Clear
Update
Mostly Dry
21 days ago
1.1 mi 1.8 km
Prairie Vista
Superior, CO
1.1 mi 1.8 km Superior, CO
All Clear
Update
Dry
20 days ago
3.2 mi 5.1 km
Eagle
Gunbarrel, CO
3.2 mi 5.1 km Gunbarrel, CO
All Clear
Update
Dry
77 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
42 days ago
Gunbarrel, CO
2.1 mi 3.3 km Gunbarrel, CO
All Clear
Update
34 days ago
8.2 mi 13.3 km
Boulder Creek Path
Boulder, CO
8.2 mi 13.3 km Boulder, CO
Minor Issues
Update
Some Mud
13 days ago
2.3 mi 3.6 km
Waldrop Trail
Nederland, CO
2.3 mi 3.6 km Nederland, CO
Unknown
Update
8.8 mi 14.2 km
Lake Link Trail
Broomfield, CO
8.8 mi 14.2 km Broomfield, 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
Lyons, CO
0.9 mi 1.5 km Lyons, CO
Minor Issues
Update
Some Mud: Pretty good.
88 days ago
Nederland, CO
0.8 mi 1.3 km Nederland, CO
All Clear
Update
Dry
59 days ago
0.7 mi 1.1 km
Boot
Nederland, CO
0.7 mi 1.1 km Nederland, CO
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
14 days ago
0.5 mi 0.9 km
Sunset Ridge
Erie, CO
0.5 mi 0.9 km Erie, CO
All Clear
Update
10 days ago
Niwot, CO
2.3 mi 3.6 km Niwot, CO
Unknown
Update
Niwot, CO
2.5 mi 4.1 km Niwot, CO
Unknown
Update
0.5 mi 0.9 km
Lookout Trail #926
Nederland, CO
0.5 mi 0.9 km Nederland, CO
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
14 days ago
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
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
14 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
77 days ago
0.8 mi 1.3 km
Cowdrey Draw
Superior, CO
0.8 mi 1.3 km Superior, CO
All Clear
Update
Mostly Dry
21 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
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
14 days ago
0.6 mi 1.0 km
Little Raven East
Nederland, CO
0.6 mi 1.0 km Nederland, CO
Unknown
Update
2.6 mi 4.2 km
Chapman Drive
Boulder, CO
2.6 mi 4.2 km Boulder, CO
Minor Issues
Update
Some Mud
13 days ago
1.4 mi 2.3 km
Greenbelt Plateau
Superior, CO
1.4 mi 2.3 km Superior, CO
All Clear
Update
Mostly Dry
21 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
0.5 mi 0.7 km
Erie Forest
Erie, CO
0.5 mi 0.7 km Erie, CO
All Clear
Update
10 days ago
Superior, CO
1.2 mi 1.9 km Superior, CO
All Clear
Update
Dry
63 days ago
Boulder, CO
3.4 mi 5.4 km Boulder, CO
Unknown
Update
2.3 mi 3.7 km
Foothills
Boulder, CO
2.3 mi 3.7 km Boulder, CO
Minor Issues
Update
Some Mud
13 days ago
1.3 mi 2.0 km
Cottontail Trail
Gunbarrel, CO
1.3 mi 2.0 km Gunbarrel, CO
Unknown
Update
0.9 mi 1.5 km
Rock Creek Trail
Broomfield, CO
0.9 mi 1.5 km Broomfield, CO
All Clear
Update
Dry
18 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
2.8 mi 4.5 km
Coalton
Superior, CO
2.8 mi 4.5 km Superior, CO
All Clear
Update
Dry
72 days ago
3.1 mi 4.9 km
Davidson Mesa Loop
Louisville, CO
3.1 mi 4.9 km Louisville, CO
All Clear
Update
Dry
45 days ago
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
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
All Clear
Update
Dry
59 days ago
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
14 days ago
Gunbarrel, CO
2.1 mi 3.4 km Gunbarrel, CO
All Clear
Update
34 days ago
0.9 mi 1.4 km
Tungsten Loop
Nederland, CO
0.9 mi 1.4 km Nederland, CO
All Clear
Update
Dry
59 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
14 days ago
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
14 days ago
1.3 mi 2.0 km
Cottonwood Trail
Gunbarrel, CO
1.3 mi 2.0 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
69 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
Minor Issues
Update
Muddy - Occasional muddy spots, particularly over Roots and Stones segment
14 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
14 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
14 days ago