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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: 22

7.4 mi 11.9 km
Betasso Preserve
Boulder, CO
7.4 mi 11.9 km Boulder, CO
All Clear
Update
Dry, Snowy - Patches of snow/ice but mostly dry.
23 hours ago
210 
11.8 mi 18.9 km
Hall Ranch
Lyons, CO
11.8 mi 18.9 km Lyons, CO
Minor Issues
Update
Muddy, Some Mud - Very muddy at thr bottom and puddles throughout the rock garden. Need a few more days to dry
26 days ago
224 
7.8 mi 12.6 km
Walker Ranch
Coal Creek, CO
7.8 mi 12.6 km Coal Creek, CO
Minor Issues
Update
Icy: There are very few short sections of crusty snow or spotted icy patches.
1 day ago
174 
8.0 mi 12.8 km
Heil Ranch
Lyons, CO
8.0 mi 12.8 km Lyons, CO
All Clear
Update
Dry
1 day ago
135 
Superior, CO
10.4 mi 16.8 km Superior, CO
All Clear
Update
Dry
42 days ago
80 
15.7 mi 25.3 km
Dirty Bismark
Superior, CO
15.7 mi 25.3 km Superior, CO
All Clear
Update
Mostly Dry: Few patches of snow/mud
9 days ago
152 
12.6 mi 20.3 km
Spring Brook Loop
Superior, CO
12.6 mi 20.3 km Superior, CO
Bad / Closed
Update
Muddy: Dowdy draw descent to Spring Brook loop is a mud bog
18 days ago
71 
Nederland, CO
12.5 mi 20.1 km Nederland, CO
Minor Issues
Update
Muddy, Snowy - Quite a bit of mud and a few snowy spots remain.
57 days ago
48 
Lyons, CO
14.6 mi 23.5 km Lyons, CO
All Clear
Update
Dry - nice and dry!
41 days ago
47 
16.2 mi 26.1 km
Super Betasso
Boulder, CO
16.2 mi 26.1 km Boulder, CO
Minor Issues
Update
Snowy - Minor snow it some areas but still in great shape
7 hours ago
50 
7.9 mi 12.6 km
West Magnolia Tour
Nederland, CO
7.9 mi 12.6 km Nederland, CO
Minor Issues
Update
Dry, Snowy, Icy: A mix of snow, ice, and dry dirt 2018-11-22 a.m. with a temp of about 31F.
25 days ago
52 
Nederland, CO
16.3 mi 26.2 km Nederland, CO
All Clear
Update
perfect loam
88 days ago
43 
Lyons, CO
33.1 mi 53.3 km Lyons, CO
All Clear
Update
Dry
43 days ago
24 
10.1 mi 16.3 km
Ride like a Moto
Niwot, CO
10.1 mi 16.3 km Niwot, CO
Unknown
Update
26 
10.0 mi 16.1 km
Rhythm & Blues
Nederland, CO
10.0 mi 16.1 km Nederland, CO
Minor Issues
Update
Dry, Snowy, Icy: A mix of snow, ice, and dry dirt 2018-11-22 a.m. with a temp of about 31F.
25 days ago
15 
Boulder, CO
71.3 mi 114.8 km Boulder, CO
All Clear
Update
A few puddles on Rollins Pass. Even with that it’s all in great shape.
92 days ago
Boulder, CO
2.0 mi 3.2 km Boulder, CO
Unknown
Update
17 
Erie, CO
6.7 mi 10.8 km Erie, CO
All Clear
Update
Dry: Some snow powder in shadows of turns but no mud or ice.
22 days ago
25 
Nederland, CO
6.2 mi 9.9 km Nederland, CO
Unknown
Update
14 
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
All Clear
Update
Dry - 2 underpasses have been recently muddy and flooded. They are dry at the moment.
85 days ago
14 
Boulder, CO
11.4 mi 18.4 km Boulder, CO
Unknown
Update
11 

Trails: 108

5.3 mi 8.5 km
Picture Rock
Lyons, CO
5.3 mi 8.5 km Lyons, CO
Bad / Closed
Update
Muddy - Closed as of this morning.
7 hours ago
79 
Lyons, CO
2.5 mi 4.0 km Lyons, CO
All Clear
Update
Dry
3 days ago
62 
2.2 mi 3.6 km
Nelson Loop
Lyons, CO
2.2 mi 3.6 km Lyons, CO
Bad / Closed
Update
Muddy, Snowy, Some Mud
26 days ago
45 
1.2 mi 1.9 km
Betasso Link Trail
Boulder, CO
1.2 mi 1.9 km Boulder, CO
All Clear
Update
Dry, Snowy - Patches of snow/ice but mostly dry.
23 hours ago
53 
Lyons, CO
1.4 mi 2.2 km Lyons, CO
All Clear
Update
Dry
41 days ago
34 
2.3 mi 3.7 km
Benjamin Loop
Boulder, CO
2.3 mi 3.7 km Boulder, CO
All Clear
Update
Dry, Snowy - Patches of snow/ice but mostly dry.
23 hours ago
29 
3.3 mi 5.3 km
Canyon Loop
Boulder, CO
3.3 mi 5.3 km Boulder, CO
All Clear
Update
Dry, Snowy - Patches of snow/ice but mostly dry.
23 hours ago
36 
0.9 mi 1.5 km
Antelope Trail
Lyons, CO
0.9 mi 1.5 km Lyons, CO
All Clear
Update
Dry, Snowy - Open.
3 days ago
32 
2.9 mi 4.7 km
Wild Turkey Trail
Lyons, CO
2.9 mi 4.7 km Lyons, CO
All Clear
Update
2 days ago
32 
0.1 mi 0.2 km
Dual Slalom
Boulder, CO
0.1 mi 0.2 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
Corkscrew
Boulder, CO
0.1 mi 0.2 km Boulder, CO
Unknown
Update
3.2 mi 5.2 km
School Bus #929
Nederland, CO
3.2 mi 5.2 km Nederland, CO
Bad / Closed
Update
Snowy - lots of snow at lost meadow into the trees
51 days ago
18 
Nederland, CO
6.0 mi 9.7 km Nederland, CO
Unknown
Update
13 
2.6 mi 4.1 km
Wapiti Trail
Lyons, CO
2.6 mi 4.1 km Lyons, CO
All Clear
Update
2 days ago
34 
0.1 mi 0.2 km
Large 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
2.7 mi 4.3 km
Ponderosa Loop
Lyons, CO
2.7 mi 4.3 km Lyons, CO
All Clear
Update
2 days ago
31 
Nederland, CO
5.9 mi 9.5 km Nederland, CO
Unknown
Update
23 
0.7 mi 1.0 km
Black Line
Erie, CO
0.7 mi 1.0 km Erie, CO
Bad / Closed
Update
Snowy, Icy
34 days ago
12 
Boulder, CO
0.6 mi 1.0 km Boulder, CO
Unknown
Update
3.0 mi 4.8 km
Eagle Wind
Lyons, CO
3.0 mi 4.8 km Lyons, CO
All Clear
Update
Dry
3 days ago
25 
0.1 mi 0.2 km
Small Slopestyle
Boulder, CO
0.1 mi 0.2 km Boulder, CO
Unknown
Update
1.9 mi 3.0 km
Re-Root #927
Nederland, CO
1.9 mi 3.0 km Nederland, CO
Minor Issues
Update
Dry, Snowy, Icy: A mix of snow, ice, and dry dirt 2018-11-22 a.m. with a temp of about 31F.
25 days ago
15 
0.7 mi 1.2 km
Green Trail
Erie, CO
0.7 mi 1.2 km Erie, CO
All Clear
Update
Dry
85 days ago
15 
0.3 mi 0.5 km
Dirt 101
Boulder, CO
0.3 mi 0.5 km Boulder, CO
Unknown
Update
2.2 mi 3.5 km
Doudy Draw
Superior, CO
2.2 mi 3.5 km Superior, CO
Bad / Closed
Update
Muddy: The descent down the top section of Dowdy is a mud bog right now.
18 days ago
23 
0.8 mi 1.3 km
Fourmile Link
Boulder, CO
0.8 mi 1.3 km Boulder, CO
Minor Issues
Update
Some Mud - Overall very nice
66 days ago
15 
Nederland, CO
1.5 mi 2.4 km Nederland, CO
Minor Issues
Update
Muddy, Snowy - Quite a bit of mud and a few snowy spots remain.
57 days ago
10 
1.7 mi 2.8 km
Little Raven Trail
Nederland, CO
1.7 mi 2.8 km Nederland, CO
Unknown
Update
0.7 mi 1.1 km
Blue Trail
Erie, CO
0.7 mi 1.1 km Erie, CO
All Clear
Update
Dry
85 days ago
14 
Nederland, CO
1.9 mi 3.1 km Nederland, CO
Unknown
Update
Boulder, CO
1.1 mi 1.8 km Boulder, CO
Bad / Closed
Update
Muddy
18 days ago
19 
Boulder, CO
2.3 mi 3.7 km Boulder, CO
All Clear
Update
Dry
53 days ago
17 
0.9 mi 1.5 km
Sugar Magnolia #926
Nederland, CO
0.9 mi 1.5 km Nederland, CO
Minor Issues
Update
Muddy, Snowy - Quite a bit of mud and a few snowy spots remain.
57 days ago
10 
0.1 mi 0.2 km
Espresso
Boulder, CO
0.1 mi 0.2 km Boulder, CO
Unknown
Update
0.6 mi 0.9 km
Coal Seam
Superior, CO
0.6 mi 0.9 km Superior, CO
Minor Issues
Update
Some snow and ice in scattered spots. There was minor issues with some mud at the beginning of the trail but morning major.
23 days ago
Superior, CO
2.1 mi 3.4 km Superior, CO
All Clear
Update
Dry
42 days ago
17 
0.9 mi 1.4 km
Marshall Valley
Superior, CO
0.9 mi 1.4 km Superior, CO
Bad / Closed
Update
Closed according to OSMP as of 8am 11/23
24 days ago
10 
Nederland, CO
0.8 mi 1.3 km Nederland, CO
Minor Issues
Update
Muddy, Snowy - Quite a bit of mud and a few snowy spots remain.
57 days ago
2.3 mi 3.7 km
Wapiti Trail
Nederland, CO
2.3 mi 3.7 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
Sept 2018, The underpass at Hwy 36 is open now.
78 days ago
10 
1.1 mi 1.7 km
Reboot
Nederland, CO
1.1 mi 1.7 km Nederland, CO
Minor Issues
Update
Dry, Snowy, Icy: A mix of snow, ice, and dry dirt 2018-11-22 a.m. with a temp of about 31F.
25 days ago
2.7 mi 4.4 km
High Plains
Superior, CO
2.7 mi 4.4 km Superior, CO
Bad / Closed
Update
Closed according to OSMP as of 8am 11/23
24 days ago
10 
0.7 mi 1.1 km
Boot
Nederland, CO
0.7 mi 1.1 km Nederland, CO
Minor Issues
Update
Muddy, Snowy - Quite a bit of mud and a few snowy spots remain.
57 days ago
0.4 mi 0.6 km
Hotlap
Boulder, CO
0.4 mi 0.6 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
2.9 mi 4.7 km
Left Hand
Niwot, CO
2.9 mi 4.7 km Niwot, 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
Minor Issues
Update
Muddy, Snowy - Quite a bit of mud and a few snowy spots remain.
57 days ago
1.0 mi 1.7 km
Josie Heath Trail
Coal Creek, CO
1.0 mi 1.7 km Coal Creek, CO
Unknown
Update
1.1 mi 1.7 km
Hobbit 3 #927
Nederland, CO
1.1 mi 1.7 km Nederland, CO
Minor Issues
Update
Muddy, Snowy - Quite a bit of mud and a few snowy spots remain.
57 days ago
1.1 mi 1.8 km
Prairie Vista
Superior, CO
1.1 mi 1.8 km Superior, CO
All Clear
Update
Dry
42 days ago
Superior, CO
3.0 mi 4.8 km Superior, CO
Bad / Closed
Update
Closed according to OSMP as of 8am 11/23
24 days ago
Coal Creek, CO
2.6 mi 4.2 km Coal Creek, CO
Unknown
Update
2.3 mi 3.8 km
Meadowlark
Superior, CO
2.3 mi 3.8 km Superior, CO
Unknown
Update
8.2 mi 13.3 km
Boulder Creek Path
Boulder, CO
8.2 mi 13.3 km Boulder, CO
Minor Issues
Update
Some Mud - Most areas are in great condition. In the woods there are some muddy puddles and wet spots.
59 days ago
11 
Gunbarrel, CO
2.1 mi 3.3 km Gunbarrel, 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
Minor Issues
Update
Muddy, Snowy - Quite a bit of mud and a few snowy spots remain.
57 days ago
Niwot, CO
3.7 mi 6.0 km Niwot, CO
Unknown
Update
Nederland, CO
0.8 mi 1.3 km Nederland, CO
Unknown
Update
1.5 mi 2.4 km
355.1D
Nederland, CO
1.5 mi 2.4 km Nederland, CO
Minor Issues
Update
Muddy, Snowy - Quite a bit of mud and a few snowy spots remain.
57 days ago
2.3 mi 3.6 km
Waldrop Trail
Nederland, CO
2.3 mi 3.6 km Nederland, CO
Unknown
Update
3.3 mi 5.3 km
Dry Creek Trail
Lafayette, CO
3.3 mi 5.3 km Lafayette, CO
Unknown
Update
Niwot, CO
2.5 mi 4.1 km Niwot, CO
Unknown
Update
Niwot, CO
2.3 mi 3.6 km Niwot, CO
Unknown
Update
Nederland, CO
0.9 mi 1.4 km Nederland, CO
Unknown
Update
0.6 mi 0.9 km
Lookout Trail #926
Nederland, CO
0.6 mi 0.9 km Nederland, CO
Minor Issues
Update
Muddy, Snowy - Quite a bit of mud and a few snowy spots remain.
57 days ago
1.4 mi 2.3 km
Greenbelt Plateau
Superior, CO
1.4 mi 2.3 km Superior, CO
Minor Issues
Update
Some snow and ice in scattered spots. There was minor issues with some mud at the beginning of the trail but morning major.
23 days ago
12 
3.2 mi 5.1 km
Eagle
Gunbarrel, CO
3.2 mi 5.1 km Gunbarrel, CO
Unknown
Update
2.1 mi 3.3 km
Interim Joder Trail
Niwot, CO
2.1 mi 3.3 km Niwot, CO
Unknown
Update
3.7 mi 6.0 km
Community Ditch
Superior, CO
3.7 mi 6.0 km Superior, CO
Minor Issues
Update
Some snow and ice in scattered spots. There was minor issues with some mud at the beginning of the trail but morning major.
23 days ago
14 
Lyons, CO
0.9 mi 1.5 km Lyons, CO
All Clear
Update
Dry
3 days ago
0.5 mi 0.9 km
Sunset Ridge
Erie, CO
0.5 mi 0.9 km Erie, CO
All Clear
Update
Dry
85 days ago
2.6 mi 4.2 km
Chapman Drive
Boulder, CO
2.6 mi 4.2 km Boulder, CO
Minor Issues
Update
Some Mud - Overall very nice
66 days ago
0.5 mi 0.7 km
Erie Forest
Erie, CO
0.5 mi 0.7 km Erie, CO
All Clear
Update
Dry
85 days ago
1.2 mi 2.0 km
Hobbit 1 #927
Nederland, CO
1.2 mi 2.0 km Nederland, CO
Minor Issues
Update
Dry, Snowy, Icy: A mix of snow, ice, and dry dirt 2018-11-22 a.m. with a temp of about 31F.
25 days ago
10 
8.8 mi 14.2 km
Lake Link Trail
Broomfield, CO
8.8 mi 14.2 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
2.5 mi 4.0 km
Foothills
Boulder, CO
2.5 mi 4.0 km Boulder, CO
All Clear
Update
Dry
92 days ago
0.8 mi 1.3 km
Cowdrey Draw
Superior, CO
0.8 mi 1.3 km Superior, CO
Bad / Closed
Update
Closed according to OSMP as of 8am 11/23
24 days ago
Niwot, CO
2.9 mi 4.7 km Niwot, CO
Unknown
Update
Gunbarrel, CO
2.2 mi 3.5 km Gunbarrel, 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
Nederland, CO
0.8 mi 1.3 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
3.1 mi 4.9 km
Davidson Mesa Loop
Louisville, CO
3.1 mi 4.9 km Louisville, CO
Unknown
Update
0.9 mi 1.5 km
Rock Creek Trail
Broomfield, CO
0.9 mi 1.5 km Broomfield, CO
Unknown
Update
1.9 mi 3.0 km
Sage
Gunbarrel, CO
1.9 mi 3.0 km Gunbarrel, CO
Unknown
Update
Superior, CO
1.2 mi 1.9 km Superior, CO
All Clear
Update
Dry
42 days ago
2.8 mi 4.5 km
Coalton
Superior, CO
2.8 mi 4.5 km Superior, CO
Unknown
Update
1.3 mi 2.1 km
Twin Lakes Loops
Gunbarrel, CO
1.3 mi 2.1 km Gunbarrel, CO
Unknown
Update
Lyons, CO
2.0 mi 3.2 km Lyons, 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
355.1
Nederland, CO
2.4 mi 3.8 km Nederland, CO
Minor Issues
Update
Muddy, Snowy - Quite a bit of mud and a few snowy spots remain.
57 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
Unknown
Update
3.6 mi 5.7 km
Boulder Reservoir
Gunbarrel, CO
3.6 mi 5.7 km Gunbarrel, CO
Unknown
Update
Gunbarrel, CO
2.1 mi 3.4 km Gunbarrel, CO
Unknown
Update
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, Snowy - Quite a bit of mud and a few snowy spots remain.
57 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
Unknown
Update
0.9 mi 1.5 km
355.1C
Nederland, CO
0.9 mi 1.5 km Nederland, CO
Minor Issues
Update
Muddy, Snowy - Quite a bit of mud and a few snowy spots remain.
57 days ago
0.4 mi 0.7 km
355.1A
Nederland, CO
0.4 mi 0.7 km Nederland, CO
Minor Issues
Update
Muddy, Snowy - Quite a bit of mud and a few snowy spots remain.
57 days ago