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.

20

105

412

27

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
4 days ago
116 
11.8 mi 19.0 km
Hall Ranch
Lyons, CO
11.8 mi 19.0 km Lyons, CO
All Clear
Update
Dry
8 days ago
148 
7.8 mi 12.6 km
Walker Ranch
Coal Creek, CO
7.8 mi 12.6 km Coal Creek, CO
All Clear
Update
5 days ago
99 
7.9 mi 12.7 km
Heil Ranch
Lyons, CO
7.9 mi 12.7 km Lyons, CO
All Clear
Update
Dry: All dry, even the first rocky creek-crossing. No puddles.
1 day ago
70 
15.2 mi 24.5 km
Dirty Bismark
Superior, CO
15.2 mi 24.5 km Superior, CO
All Clear
Update
Dry
10 days ago
69 
Superior, CO
10.3 mi 16.6 km Superior, CO
All Clear
Update
Dry
5 days ago
41 
16.2 mi 26.1 km
Super Betasso
Boulder, CO
16.2 mi 26.1 km Boulder, CO
All Clear
Update
Dry
18 days ago
32 
6.9 mi 11.1 km
West Magnolia Tour
Nederland, CO
6.9 mi 11.1 km Nederland, CO
All Clear
Update
Dry
1 day ago
29 
Nederland, CO
16.3 mi 26.2 km Nederland, CO
Minor Issues
Update
Snowy, Fallen Trees: The Little Raven Trail is a good mile of snow.
1 day ago
15 
12.6 mi 20.2 km
Spring Brook Loop
Superior, CO
12.6 mi 20.2 km Superior, CO
All Clear
Update
Dry
5 days ago
23 
Lyons, CO
32.9 mi 53.0 km Lyons, CO
All Clear
Update
Mud all dried up now, trail is rideable all 33 miles
5 days ago
12 
12.3 mi 19.7 km
Super Magic Bus
Nederland, CO
12.3 mi 19.7 km Nederland, CO
All Clear
Update
Dry
1 day ago
14 
Boulder, CO
2.0 mi 3.2 km Boulder, CO
Unknown
Update
10 
Erie, CO
6.7 mi 10.8 km Erie, CO
All Clear
Update
Dry
18 days ago
12 
Lyons, CO
14.6 mi 23.5 km Lyons, CO
All Clear
Update
Dry: All dry, even the first rocky creek-crossing. No puddles.
1 day ago
12.2 mi 19.6 km
East Boulder Trail
Gunbarrel, CO
12.2 mi 19.6 km Gunbarrel, CO
Bad / Closed
Update
Dry: The bridge over Boulder Creek is unpassable.
10 days ago
11.8 mi 18.9 km
Rock Creek Farm Loop
Broomfield, CO
11.8 mi 18.9 km Broomfield, 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
19 days ago
Nederland, CO
6.2 mi 9.9 km Nederland, CO
Unknown
Update
Boulder, CO
11.4 mi 18.4 km Boulder, CO
All Clear
Update
Dry
21 days ago

Trails: 105

5.3 mi 8.5 km
Picture Rock
Lyons, CO
5.3 mi 8.5 km Lyons, CO
All Clear
Update
Dry
7 days ago
55 
2.2 mi 3.6 km
Nelson Loop
Lyons, CO
2.2 mi 3.6 km Lyons, CO
All Clear
Update
Dry
8 days ago
28 
1.2 mi 1.9 km
Betasso Link Trail
Boulder, CO
1.2 mi 1.9 km Boulder, CO
All Clear
Update
Dry
4 days ago
33 
Lyons, CO
1.4 mi 2.2 km Lyons, CO
All Clear
Update
Dry
8 days ago
21 
2.3 mi 3.7 km
Benjamin Loop
Boulder, CO
2.3 mi 3.7 km Boulder, CO
All Clear
Update
Dry
18 days ago
20 
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.
1 day ago
23 
Nederland, CO
6.0 mi 9.7 km Nederland, CO
Minor Issues
Update
Perfect between highway and N Sourdough junction. One deadfall to duck. Did not go above said junction but it's probably rideable at least for a wh...
13 days ago
3.3 mi 5.3 km
Canyon Loop
Boulder, CO
3.3 mi 5.3 km Boulder, CO
All Clear
Update
Dry
4 days ago
19 
Nederland, CO
5.9 mi 9.5 km Nederland, CO
Minor Issues
Update
Muddy, Snowy, Fallen Trees: As of June 11th, trail still has patches of snow that need to be walked as well as fallen trees that have to be carried over.
11 days ago
13 
2.6 mi 4.1 km
Wapiti Trail
Lyons, CO
2.6 mi 4.1 km Lyons, CO
All Clear
Update
Dry: All dry, even the first rocky creek-crossing. No puddles.
1 day ago
23 
3.2 mi 5.2 km
School Bus #929
Nederland, CO
3.2 mi 5.2 km Nederland, CO
All Clear
Update
Dry
1 day ago
10 
2.7 mi 4.3 km
Ponderosa Loop
Lyons, CO
2.7 mi 4.3 km Lyons, CO
All Clear
Update
Dry: All dry, even the first rocky creek-crossing. No puddles.
1 day ago
23 
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
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
Dry
18 days ago
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
1.8 mi 2.9 km
Re-Root #927
Nederland, CO
1.8 mi 2.9 km Nederland, CO
All Clear
Update
Dry
1 day ago
10 
1.7 mi 2.8 km
Little Raven Trail
Nederland, CO
1.7 mi 2.8 km Nederland, CO
Bad / Closed
Update
Muddy, Snowy, Fallen Trees
1 day ago
0.8 mi 1.3 km
Fourmile Link
Boulder, CO
0.8 mi 1.3 km Boulder, CO
All Clear
Update
Dry
21 days ago
10 
3.0 mi 4.8 km
Eagle Wind
Lyons, CO
3.0 mi 4.8 km Lyons, CO
All Clear
Update
Dry
12 days ago
14 
Boulder, CO
1.9 mi 3.1 km Boulder, CO
All Clear
Update
Dry
21 days ago
13 
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
15 
Superior, CO
1.4 mi 2.2 km Superior, CO
All Clear
Update
6 days ago
13 
0.9 mi 1.4 km
Sugar Magnolia #926
Nederland, CO
0.9 mi 1.4 km Nederland, CO
All Clear
Update
Dry
1 day ago
Nederland, CO
0.8 mi 1.3 km Nederland, CO
All Clear
Update
Dry
1 day 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
1 day ago
Nederland, CO
2.9 mi 4.6 km Nederland, CO
All Clear
Update
Dry
1 day ago
11.4 mi 18.3 km
Coal Creek Trail
Superior, CO
11.4 mi 18.3 km Superior, CO
Unknown
Update
0.6 mi 0.9 km
Coal Seam
Superior, CO
0.6 mi 0.9 km Superior, CO
All Clear
Update
Dry
10 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
All Clear
Update
Dry
5 days ago
12 
2.3 mi 3.7 km
Wapiti Trail
Nederland, CO
2.3 mi 3.7 km Nederland, CO
Bad / Closed
Update
13 days ago
2.6 mi 4.2 km
High Plains
Superior, CO
2.6 mi 4.2 km Superior, CO
Bad / Closed
Update
closed from may 1st thru July 31st
33 days ago
0.9 mi 1.4 km
Marshall Valley
Superior, CO
0.9 mi 1.4 km Superior, CO
All Clear
Update
Dry
10 days ago
1.1 mi 1.7 km
Reboot
Nederland, CO
1.1 mi 1.7 km Nederland, CO
All Clear
Update
Dry
1 day ago
2.9 mi 4.7 km
Left Hand
Niwot, CO
2.9 mi 4.7 km Niwot, CO
All Clear
Update
TEST 123 TEst 1334334333 From the north, turn off of Neva Road through the gate just east of the parking lot. Cruise about three-quarters of a mile...
19 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
All Clear
Update
Dry
1 day ago
0.7 mi 1.2 km
Green Trail
Erie, CO
0.7 mi 1.2 km Erie, CO
All Clear
Update
Dry
18 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
1 day ago
Coal Creek, CO
2.6 mi 4.2 km Coal Creek, CO
All Clear
Update
Dry
5 days ago
3.2 mi 5.1 km
Eagle
Gunbarrel, CO
3.2 mi 5.1 km Gunbarrel, CO
All Clear
Update
Dry
19 days ago
Superior, CO
3.0 mi 4.8 km Superior, CO
All Clear
Update
Dry
10 days ago
1.1 mi 1.8 km
Prairie Vista
Superior, CO
1.1 mi 1.8 km Superior, CO
Minor Issues
Update
Dry - Some erosion from water has shifted some rocks around a bit. nothing major
14 days ago
Gunbarrel, CO
2.1 mi 3.3 km Gunbarrel, CO
Bad / Closed
Update
The bridge over Boulder Creek is closed and is impassible.
9 days ago
Niwot, CO
3.7 mi 6.0 km Niwot, 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
21 days ago
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
1.1 mi 1.8 km
Hobbit 1 #927
Nederland, CO
1.1 mi 1.8 km Nederland, CO
All Clear
Update
Dry
1 day ago
Coal Creek, CO
1.0 mi 1.7 km Coal Creek, CO
All Clear
Update
Dry
5 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
All Clear
Update
Dry
1 day ago
0.7 mi 1.1 km
Boot
Nederland, CO
0.7 mi 1.1 km Nederland, CO
All Clear
Update
Dry
1 day ago
Lyons, CO
0.9 mi 1.5 km Lyons, CO
Minor Issues
Update
Some Mud: Pretty good.
30 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
Nederland, CO
1.9 mi 3.1 km Nederland, CO
Unknown
Update
0.5 mi 0.9 km
Lookout Trail #926
Nederland, CO
0.5 mi 0.9 km Nederland, CO
All Clear
Update
Dry
1 day 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
0.8 mi 1.3 km
Cowdrey Draw
Superior, CO
0.8 mi 1.3 km Superior, CO
All Clear
Update
39 days ago
0.7 mi 1.1 km
Blue Trail
Erie, CO
0.7 mi 1.1 km Erie, CO
All Clear
Update
Dry
18 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
All Clear
Update
Dry
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
18 days ago
8.8 mi 14.2 km
Lake Link Trail
Broomfield, CO
8.8 mi 14.2 km Broomfield, 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
19 days ago
1.4 mi 2.3 km
Greenbelt Plateau
Superior, CO
1.4 mi 2.3 km Superior, CO
All Clear
Update
Dry
10 days ago
2.6 mi 4.2 km
Chapman Drive
Boulder, CO
2.6 mi 4.2 km Boulder, CO
All Clear
Update
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
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
Unknown
Update
1.3 mi 2.0 km
Cottontail Trail
Gunbarrel, CO
1.3 mi 2.0 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
Dry
18 days ago
0.9 mi 1.5 km
Rock Creek Trail
Broomfield, CO
0.9 mi 1.5 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
Superior, CO
1.2 mi 1.9 km Superior, CO
All Clear
Update
Dry
5 days ago
1.9 mi 3.0 km
Sage
Gunbarrel, CO
1.9 mi 3.0 km Gunbarrel, CO
All Clear
Update
Mostly Dry
50 days ago
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
14 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
3.1 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
All Clear
Update
Dry
1 day ago
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
All Clear
Update
Dry
1 day ago
0.9 mi 1.4 km
Tungsten Loop
Nederland, CO
0.9 mi 1.4 km Nederland, CO
All Clear
Update
Dry
1 day ago
1.2 mi 1.9 km
Kinnickinnick Loop
Nederland, CO
1.2 mi 1.9 km Nederland, CO
All Clear
Update
Dry
1 day ago
1.5 mi 2.5 km
CR 132 West
Nederland, CO
1.5 mi 2.5 km Nederland, CO
All Clear
Update
Dry
1 day 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
12 days ago
1.6 mi 2.5 km
North Rim
Boulder, CO
1.6 mi 2.5 km Boulder, CO
All Clear
Update
Mostly Dry
50 days ago
1.5 mi 2.4 km
355D
Nederland, CO
1.5 mi 2.4 km Nederland, CO
All Clear
Update
Dry
1 day ago
0.9 mi 1.5 km
355C
Nederland, CO
0.9 mi 1.5 km Nederland, CO
All Clear
Update
Dry
1 day ago
0.4 mi 0.6 km
355T
Nederland, CO
0.4 mi 0.6 km Nederland, CO
All Clear
Update
Dry
1 day ago