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.

11.8 mi 18.9 km Hall Ranch Difficult Lyons, CO	Difficult	Lyons, CO	Unknown Update	312
7.1 mi 11.5 km Betasso Preserve Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update Dry 1 day ago	389
8.0 mi 12.8 km West Magnolia Tour Intermediate Nederland, CO	Intermediate	Nederland, CO	All Clear Update Dry - Best ridden backwards! 96 days ago	108
7.8 mi 12.6 km Walker Ranch Difficult Coal Creek, CO	Difficult	Coal Creek, CO	All Clear Update 1 day ago	311
13.1 mi 21.1 km West Mag Backcountry Big Ride Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	All Clear Update Dry - Best ridden backwards! 96 days ago	103
16.3 mi 26.2 km Super Betasso Intermediate/Difficult Boulder, CO	Intermediate/Difficult	Boulder, CO	Unknown Update	83
10.4 mi 16.8 km Marshall Mesa - Doudy Draw Loops Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update Dry 18 days ago	136
15.1 mi 24.4 km Picture Rock/Wild Turkey Loop Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update Dry 17 days ago	153
12.6 mi 20.2 km Spring Brook Loop Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update Dry 64 days ago	151
8.9 mi 14.3 km Heil Ranch Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update 2 days ago	224
15.7 mi 25.2 km Dirty Bismark Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update 65 days ago	288
16.3 mi 26.2 km South Saint Vrain Figure 8 Difficult Nederland, CO	Difficult	Nederland, CO	Unknown Update	71
10.1 mi 16.3 km Ride like a Moto Difficult Niwot, CO	Difficult	Niwot, CO	Unknown Update	58
6.7 mi 10.8 km Post Work Sunset Ride Intermediate Erie, CO	Intermediate	Erie, CO	All Clear Update Dry 92 days ago	49
10.3 mi 16.6 km Rhythm & Blues Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	33
34.1 mi 54.9 km Heil to Picture to Hall and Back Difficult Lyons, CO	Difficult	Lyons, CO	All Clear Update Dry 78 days ago	32
2.0 mi 3.2 km Valmont Bike Park - Singletrack Hotlap Intermediate Boulder, CO	Intermediate	Boulder, CO	Unknown Update	31
16.9 mi 27.1 km The Whole Casino Difficult Central City, CO	Difficult	Central City, CO	Unknown Update	9
71.3 mi 114.8 km Indian Peaks Traverse (IPT) Difficult Boulder, CO	Difficult	Boulder, CO	Unknown Update	13
18.1 mi 29.1 km West Mag to Eldora and Back Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	5
13.0 mi 21.0 km The N Bus Loop Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	9
6.2 mi 9.9 km Ceran St. Vrain to Miller Rock Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	22
12.2 mi 19.6 km East Boulder Trail Easy/Intermediate Gunbarrel, CO	Easy/Intermediate	Gunbarrel, CO	Unknown Update	15
14.1 mi 22.6 km Heil Outer Loop from Corral TH Intermediate/Difficult Lyons, CO	Intermediate/Difficult	Lyons, CO	All Clear Update 91 days ago	6
11.8 mi 18.9 km Rock Creek Farm Loop Easy Broomfield, CO	Easy	Broomfield, CO	All Clear Update 26 days ago	20
11.2 mi 18.1 km Chapman Drive Out-And-Back Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	Unknown Update	20

2.5 mi 4.0 km Bitterbrush - Lower Section Difficult Lyons, CO	Difficult	Lyons, CO	All Clear Update Dry 16 days ago	99
5.3 mi 8.5 km Picture Rock Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update 71 days ago	136
2.2 mi 3.6 km Nelson Loop Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update Dry 14 days ago	74
1.2 mi 1.9 km Betasso Link Trail Difficult Boulder, CO	Difficult	Boulder, CO	All Clear Update Dry 1 day ago	94
3.3 mi 5.3 km Canyon Loop Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update Dry 1 day ago	71
2.3 mi 3.7 km Benjamin Loop Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update Dry 1 day ago	46
1.4 mi 2.3 km Bitterbrush - Upper Section Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update Dry 14 days ago	50
1.1 mi 1.8 km Fast Money Intermediate Central City, CO	Intermediate	Central City, CO	Minor Issues Update a few snow/ice spots but still good to ride 15 days ago	36
1.0 mi 1.6 km Antelope Trail Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update Dry 14 days ago	51
3.1 mi 5.0 km Wapiti Trail Intermediate/Difficult Lyons, CO	Intermediate/Difficult	Lyons, CO	All Clear Update 2 days ago	59
6.0 mi 9.7 km South Saint Vrain Trail (#909) Very Difficult Nederland, CO	Very Difficult	Nederland, CO	Unknown Update	33
3.0 mi 4.8 km Eagle Wind Intermediate Lyons, CO	Intermediate	Lyons, CO	Unknown Update	52
5.9 mi 9.5 km South Sourdough (#835) Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	43
0.7 mi 1.0 km Black Line Difficult Erie, CO	Difficult	Erie, CO	Unknown Update	30
3.0 mi 4.8 km Wild Turkey Trail Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update 2 days ago	42
3.2 mi 5.2 km School Bus #929 Intermediate Nederland, CO	Intermediate	Nederland, CO	Unknown Update	30
2.2 mi 3.5 km Doudy Draw Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update Dry 67 days ago	42
2.7 mi 4.3 km Ponderosa Loop Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update 2 days ago	42
0.1 mi 0.2 km Dual Slalom Intermediate/Difficult Boulder, CO	Intermediate/Difficult	Boulder, CO	All Clear Update 75 days ago	12
1.5 mi 2.4 km Aspen Alley Trail #342A Intermediate Nederland, CO	Intermediate	Nederland, CO	Minor Issues Update Snowy - Packed snow on trail a little muddy in a few spots but rideable 16 days ago	23
0.1 mi 0.2 km XL Slopestyle Very Difficult Boulder, CO	Very Difficult	Boulder, CO	Unknown Update	8
0.1 mi 0.2 km Large Slopestyle Difficult Boulder, CO	Difficult	Boulder, CO	Unknown Update	10
0.7 mi 1.1 km Blue Trail Intermediate Erie, CO	Intermediate	Erie, CO	Unknown Update	26
0.1 mi 0.2 km Corkscrew Intermediate Boulder, CO	Intermediate	Boulder, CO	Unknown Update	12
0.8 mi 1.3 km Schoolhouse Loop Easy Lyons, CO	Easy	Lyons, CO	All Clear Update 2 days ago	13
2.3 mi 3.7 km Spring Brook Loop North Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update Dry 67 days ago	31
0.1 mi 0.1 km Medium Slopestyle Intermediate/Difficult Boulder, CO	Intermediate/Difficult	Boulder, CO	All Clear Update 75 days ago	10
1.9 mi 3.0 km Re-Root #927 Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	All Clear Update Dry - Best ridden backwards! 96 days ago	22
0.7 mi 1.2 km Green Trail Easy/Intermediate Erie, CO	Easy/Intermediate	Erie, CO	Unknown Update	22
0.4 mi 0.6 km Skills Loop Easy/Intermediate Lyons, CO	Easy/Intermediate	Lyons, CO	All Clear Update 2 days ago	6
3.9 mi 6.2 km North Sky Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	All Clear Update Dry 72 days ago	18
0.8 mi 1.3 km Fourmile Link Intermediate Boulder, CO	Intermediate	Boulder, CO	Unknown Update	23
4.2 mi 6.7 km Hobbit Intermediate Nederland, CO	Intermediate	Nederland, CO	Minor Issues Update Snowy - Packed snow on trail a little muddy in a few spots but rideable 16 days ago	17
0.5 mi 0.9 km Lower Fast Money Intermediate/Difficult Central City, CO	Intermediate/Difficult	Central City, CO	Unknown Update	3
1.1 mi 1.8 km Spring Brook Loop South Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update Dry 67 days ago	30
1.7 mi 2.8 km Little Raven Trail Difficult Nederland, CO	Difficult	Nederland, CO	Unknown Update	14
0.6 mi 1.0 km The Glades - Outer Loop Intermediate Boulder, CO	Intermediate	Boulder, CO	Unknown Update	10
0.3 mi 0.5 km Short Stack Intermediate Nederland, CO	Intermediate	Nederland, CO	Unknown Update	4
0.1 mi 0.2 km Small Slopestyle Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update 75 days ago	10
4.9 mi 7.9 km Kinglet Intermediate Nederland, CO	Intermediate	Nederland, CO	Unknown Update	9
12.4 mi 20.0 km Coal Creek Trail Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	Unknown Update	19
0.9 mi 1.5 km Sugar Magnolia #926 Difficult Nederland, CO	Difficult	Nederland, CO	Unknown Update	17
0.6 mi 0.9 km Coal Seam Intermediate Superior, CO	Intermediate	Superior, CO	Unknown Update	14
2.9 mi 4.7 km Left Hand Easy/Intermediate Niwot, CO	Easy/Intermediate	Niwot, CO	All Clear Update Dry 59 days ago	19
2.7 mi 4.4 km High Plains Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Dry 88 days ago	22
1.9 mi 3.1 km Ceran Saint Vrain #801 Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	10
0.9 mi 1.4 km Marshall Valley Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update Dry 36 days ago	18
0.3 mi 0.5 km Dirt 101 Intermediate Boulder, CO	Intermediate	Boulder, CO	Unknown Update	6
2.1 mi 3.4 km Flatirons Vista South Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	Unknown Update	27
2.1 mi 3.3 km Interim Joder Trail Intermediate Niwot, CO	Intermediate	Niwot, CO	Unknown Update	24
1.2 mi 1.9 km Kinnickinnick Loop Easy/Intermediate Nederland, CO	Easy/Intermediate	Nederland, CO	Unknown Update	5
1.0 mi 1.7 km Josie Heath Trail Intermediate Coal Creek, CO	Intermediate	Coal Creek, CO	Unknown Update	8
2.6 mi 4.2 km Chapman Drive Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	Unknown Update	14
3.7 mi 6.0 km Community Ditch Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Dry 36 days ago	26
1.0 mi 1.6 km Observatory Trail #355 Intermediate Nederland, CO	Intermediate	Nederland, CO	All Clear Update Dry - Best ridden backwards! 96 days ago	6
0.1 mi 0.2 km Espresso Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	Unknown Update	4
1.1 mi 1.8 km Cobalt Trail Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	Unknown Update	4
2.3 mi 3.7 km Wapiti Trail Difficult Nederland, CO	Difficult	Nederland, CO	Unknown Update	7
1.1 mi 1.7 km Reboot Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	8
0.4 mi 0.6 km Hobbit 3 #927 Intermediate Nederland, CO	Intermediate	Nederland, CO	All Clear Update Dry - Best ridden backwards! 96 days ago	12
0.9 mi 1.4 km Tungsten Loop Easy Nederland, CO	Easy	Nederland, CO	Unknown Update	6
0.4 mi 0.6 km Hotlap Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	Unknown Update	6
0.2 mi 0.3 km Skillz Loop Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	Unknown Update	7
5.9 mi 9.5 km Boulder Creek Path Easy Boulder, CO	Easy	Boulder, CO	Unknown Update	16
0.7 mi 1.1 km Boot Intermediate Nederland, CO	Intermediate	Nederland, CO	Unknown Update	4
2.6 mi 4.2 km Meyers Homestead Trail Easy/Intermediate Coal Creek, CO	Easy/Intermediate	Coal Creek, CO	Unknown Update	14
0.8 mi 1.3 km Whoop-Di-Doos Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Minor Issues Update Snowy - Packed snow on trail a little muddy in a few spots but rideable 16 days ago	7
2.1 mi 3.3 km East Boulder Trail - White Rocks Section Easy/Intermediate Gunbarrel, CO	Easy/Intermediate	Gunbarrel, CO	Unknown Update	6
1.3 mi 2.1 km Foothills South Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	All Clear Update Dry 94 days ago	12
0.5 mi 0.9 km Sunset Ridge Easy/Intermediate Erie, CO	Easy/Intermediate	Erie, CO	Unknown Update	10
0.6 mi 0.9 km Lookout Trail #926 Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	All Clear Update Dry - Best ridden backwards! 96 days ago	14
1.9 mi 3.0 km Sage Easy Gunbarrel, CO	Easy	Gunbarrel, CO	Unknown Update	11
2.9 mi 4.6 km Blue Dot Trail (#606.1) Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	8
2.3 mi 3.8 km Meadowlark Easy Superior, CO	Easy	Superior, CO	All Clear Update Dry 7 days ago	12
1.4 mi 2.3 km Greenbelt Plateau Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	Unknown Update	18
1.1 mi 1.8 km Prairie Vista Easy Superior, CO	Easy	Superior, CO	Unknown Update	14
2.8 mi 4.5 km Coalton Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Dry 7 days ago	19
2.0 mi 3.2 km Cottonwood Trail Easy Gunbarrel, CO	Easy	Gunbarrel, CO	Unknown Update	3
3.6 mi 5.7 km Boulder Reservoir Easy Gunbarrel, CO	Easy	Gunbarrel, CO	Unknown Update	4
2.6 mi 4.2 km Winiger Ridge Trail Intermediate/Difficult Coal Creek, CO	Intermediate/Difficult	Coal Creek, CO	Unknown Update	8
8.8 mi 14.2 km Lake Link Trail Easy/Intermediate Broomfield, CO	Easy/Intermediate	Broomfield, CO	Unknown Update	8
2.3 mi 3.6 km Waldrop Trail Difficult Nederland, CO	Difficult	Nederland, CO	Unknown Update	10
3.2 mi 5.1 km Eagle Easy/Intermediate Gunbarrel, CO	Easy/Intermediate	Gunbarrel, CO	Unknown Update	13
1.2 mi 1.9 km Flatirons Vista North Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Dry - Cows on trail 27 days ago	14
3.4 mi 5.4 km South Boulder Creek Trail Easy Boulder, CO	Easy	Boulder, CO	Unknown Update	6
0.5 mi 0.7 km Erie Forest Easy/Intermediate Erie, CO	Easy/Intermediate	Erie, CO	Unknown Update	10
0.9 mi 1.5 km Little Thompson Overlook Intermediate/Difficult Lyons, CO	Intermediate/Difficult	Lyons, CO	Unknown Update	14
3.3 mi 5.3 km Rock Creek Trail Easy Lafayette, CO	Easy	Lafayette, CO	All Clear Update Dry 75 days ago	3
3.7 mi 6.0 km Niwot Loop - Lower Section Easy Niwot, CO	Easy	Niwot, CO	Unknown Update	2
1.5 mi 2.4 km 355.1D Easy Nederland, CO	Easy	Nederland, CO	Unknown Update	2
0.6 mi 1.0 km Quartz Valley Trail Easy Central City, CO	Easy	Central City, CO	Unknown Update	7
2.3 mi 3.6 km Niwot Loop - Niwot High School Trail Easy Niwot, CO	Easy	Niwot, CO	Unknown Update	1
2.5 mi 4.1 km Niwot Loop - Upper Section Easy Niwot, CO	Easy	Niwot, CO	Unknown Update	1
0.8 mi 1.3 km Cowdrey Draw Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Dry 36 days ago	9
0.9 mi 1.5 km Rock Creek Trail Easy Broomfield, CO	Easy	Broomfield, CO	All Clear Update Dry 17 days ago	5
2.1 mi 3.3 km CU South Campus Easy Boulder, CO	Easy	Boulder, CO	Unknown Update	4
0.8 mi 1.3 km Yellow Dot Trail (#357.2A) Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	4
3.1 mi 4.9 km Davidson Mesa Loop Easy Louisville, CO	Easy	Louisville, CO	Unknown Update	5
1.9 mi 3.1 km Cottontail Trail - Gunbarrel Section Easy Gunbarrel, CO	Easy	Gunbarrel, CO	Unknown Update	2
2.2 mi 3.5 km East Boulder Trail - Gunbarrel Farm Section Easy/Intermediate Gunbarrel, CO	Easy/Intermediate	Gunbarrel, CO	Unknown Update	2
1.3 mi 2.0 km Cottontail Trail Easy Gunbarrel, CO	Easy	Gunbarrel, CO	Unknown Update	2
2.4 mi 3.8 km 355.1 Easy/Intermediate Nederland, CO	Easy/Intermediate	Nederland, CO	Unknown Update	3
1.1 mi 1.7 km Twin Lakes Regional Trail Easy Gunbarrel, CO	Easy	Gunbarrel, CO	Unknown Update	3
0.6 mi 1.0 km Little Raven East Difficult Nederland, CO	Difficult	Nederland, CO	Unknown Update	6
1.2 mi 2.0 km Dots Access Road Intermediate Nederland, CO	Intermediate	Nederland, CO	Unknown Update	5
7.3 mi 11.7 km LoBo Trail Easy Longmont, CO	Easy	Longmont, CO	Unknown Update	4
0.8 mi 1.3 km Red Dot Trail (#357.2B) Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	4
1.6 mi 2.6 km Mary Miller Trail Easy Broomfield, CO	Easy	Broomfield, CO	Unknown Update	3
2.0 mi 3.2 km North Sheep Mountain Trail Very Difficult Lyons, CO	Very Difficult	Lyons, CO	Unknown Update	2
1.3 mi 2.1 km Twin Lakes Loops Easy Gunbarrel, CO	Easy	Gunbarrel, CO	Unknown Update	5
2.1 mi 3.4 km East Boulder Trail - Teller Farm Section Easy Gunbarrel, CO	Easy	Gunbarrel, CO	Unknown Update	1
1.5 mi 2.5 km CR 132 West Easy Nederland, CO	Easy	Nederland, CO	Unknown Update	1
1.7 mi 2.7 km Indian Mesa Easy Lyons, CO	Easy	Lyons, CO	Unknown Update	6
1.6 mi 2.5 km North Rim Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	All Clear Update Dry 94 days ago	5
0.4 mi 0.7 km 355.1A Easy Nederland, CO	Easy	Nederland, CO	Unknown Update	2
0.9 mi 1.5 km 355.1C Easy Nederland, CO	Easy	Nederland, CO	Unknown Update	1

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Trails: 116

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