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	Minor Issues Update Some Mud 31 days ago	315
7.1 mi 11.5 km Betasso Preserve Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update Dry, Fallen Trees - . 18 days ago	393
8.0 mi 12.8 km West Magnolia Tour Intermediate Nederland, CO	Intermediate	Nederland, CO	All Clear Update 26 days ago	110
7.8 mi 12.6 km Walker Ranch Difficult Coal Creek, CO	Difficult	Coal Creek, CO	All Clear Update Dry 11 days ago	313
16.3 mi 26.2 km Super Betasso Intermediate/Difficult Boulder, CO	Intermediate/Difficult	Boulder, CO	All Clear Update Dry 32 days ago	86
13.1 mi 21.1 km West Mag Backcountry Big Ride Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	102
10.4 mi 16.8 km Marshall Mesa - Doudy Draw Loops Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update Dry 22 days ago	137
15.1 mi 24.4 km Picture Rock/Wild Turkey Loop Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update Mostly Dry 24 days ago	157
12.6 mi 20.2 km Spring Brook Loop Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update 89 days ago	153
8.9 mi 14.3 km Heil Ranch Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update Dry, Mostly Dry 4 days ago	227
15.7 mi 25.2 km Dirty Bismark Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update Dry 38 days ago	292
16.3 mi 26.2 km South Saint Vrain Figure 8 Difficult Nederland, CO	Difficult	Nederland, CO	Minor Issues Update Dry, Fallen Trees - Fallen trees. Couple rideable log crossings, one ride around. 60 days ago	71
10.1 mi 16.3 km Ride like a Moto Difficult Niwot, CO	Difficult	Niwot, CO	Unknown Update	59
6.7 mi 10.8 km Post Work Sunset Ride Intermediate Erie, CO	Intermediate	Erie, CO	Unknown Update	50
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	Unknown Update	32
2.0 mi 3.2 km Valmont Bike Park - Singletrack Hotlap Intermediate Boulder, CO	Intermediate	Boulder, CO	Unknown Update	32
16.9 mi 27.1 km The Whole Casino Difficult Central City, CO	Difficult	Central City, CO	All Clear Update Dry 5 days ago	11
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	10
14.1 mi 22.6 km Heil Outer Loop from Corral TH Intermediate/Difficult Lyons, CO	Intermediate/Difficult	Lyons, CO	All Clear Update 8 days ago	8
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
11.8 mi 18.9 km Rock Creek Farm Loop Easy Broomfield, CO	Easy	Broomfield, CO	All Clear Update Dry 19 days ago	20
11.2 mi 18.1 km Chapman Drive Out-And-Back Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	Unknown Update	21

2.5 mi 4.0 km Bitterbrush - Lower Section Difficult Lyons, CO	Difficult	Lyons, CO	Minor Issues Update Some Mud 31 days ago	103
2.2 mi 3.6 km Nelson Loop Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update 9 days ago	75
5.3 mi 8.5 km Picture Rock Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update Dry 17 days ago	136
1.2 mi 1.9 km Betasso Link Trail Difficult Boulder, CO	Difficult	Boulder, CO	All Clear Update Dry 11 days ago	96
3.3 mi 5.3 km Canyon Loop Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update Dry 21 days ago	72
1.1 mi 1.8 km Fast Money Intermediate Central City, CO	Intermediate	Central City, CO	Minor Issues Update Mostly Dry - Hard money and Paymaster both washed out due to recent rains. 50 days ago	40
1.4 mi 2.3 km Bitterbrush - Upper Section Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update 9 days ago	51
2.3 mi 3.7 km Benjamin Loop Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update Dry 21 days ago	46
1.0 mi 1.6 km Antelope Trail Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update 9 days ago	51
3.1 mi 5.0 km Wapiti Trail Intermediate/Difficult Lyons, CO	Intermediate/Difficult	Lyons, CO	All Clear Update 8 days ago	60
6.0 mi 9.7 km South Saint Vrain Trail (#909) Very Difficult Nederland, CO	Very Difficult	Nederland, CO	Unknown Update	33
5.9 mi 9.5 km South Sourdough (#835) Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	All Clear Update Dry - Great day! Typical Sourdough rocks & roots. 14 days ago	45
3.0 mi 4.8 km Eagle Wind Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update Dry 12 days ago	52
0.7 mi 1.0 km Black Line Difficult Erie, CO	Difficult	Erie, CO	All Clear Update Dry - Good 25 days ago	31
3.0 mi 4.8 km Wild Turkey Trail Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update 8 days ago	45
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 22 days ago	43
0.1 mi 0.2 km Dual Slalom Intermediate/Difficult Boulder, CO	Intermediate/Difficult	Boulder, CO	Unknown Update	13
2.7 mi 4.3 km Ponderosa Loop Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update Dry, Mostly Dry 4 days ago	43
1.5 mi 2.4 km Aspen Alley Trail #342A Intermediate Nederland, CO	Intermediate	Nederland, CO	All Clear Update 10 days ago	23
0.1 mi 0.2 km XL Slopestyle Very Difficult Boulder, CO	Very Difficult	Boulder, CO	Unknown Update	8
3.9 mi 6.2 km North Sky Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	All Clear Update Dry 17 days ago	23
0.1 mi 0.2 km Large Slopestyle Difficult Boulder, CO	Difficult	Boulder, CO	Unknown Update	10
0.8 mi 1.3 km Schoolhouse Loop Easy Lyons, CO	Easy	Lyons, CO	All Clear Update 88 days ago	15
0.7 mi 1.1 km Blue Trail Intermediate Erie, CO	Intermediate	Erie, CO	All Clear Update Dry - Good 5 days ago	27
2.3 mi 3.7 km Spring Brook Loop North Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update 86 days ago	32
0.1 mi 0.1 km Medium Slopestyle Intermediate/Difficult Boulder, CO	Intermediate/Difficult	Boulder, CO	Unknown Update	11
0.1 mi 0.2 km Corkscrew Intermediate Boulder, CO	Intermediate	Boulder, CO	Unknown Update	12
0.7 mi 1.2 km Green Trail Easy/Intermediate Erie, CO	Easy/Intermediate	Erie, CO	All Clear Update Dry - Good 25 days ago	23
1.9 mi 3.0 km Re-Root #927 Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	All Clear Update 10 days ago	22
0.4 mi 0.6 km Skills Loop Easy/Intermediate Lyons, CO	Easy/Intermediate	Lyons, CO	All Clear Update 8 days ago	7
0.5 mi 0.9 km Lower Fast Money Intermediate/Difficult Central City, CO	Intermediate/Difficult	Central City, CO	All Clear Update Dry 93 days ago	5
4.2 mi 6.7 km Hobbit Intermediate Nederland, CO	Intermediate	Nederland, CO	All Clear Update 10 days ago	18
0.8 mi 1.3 km Fourmile Link Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update Dry 76 days ago	23
0.1 mi 0.2 km Small Slopestyle Intermediate Boulder, CO	Intermediate	Boulder, CO	Unknown Update	11
1.1 mi 1.8 km Spring Brook Loop South Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update Dry 43 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
4.9 mi 7.9 km Kinglet Intermediate Nederland, CO	Intermediate	Nederland, CO	All Clear Update 28 days ago	9
12.4 mi 20.0 km Coal Creek Trail Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Dry 2 days ago	19
0.9 mi 1.5 km Sugar Magnolia #926 Difficult Nederland, CO	Difficult	Nederland, CO	Unknown Update	17
2.9 mi 4.7 km Left Hand Easy/Intermediate Niwot, CO	Easy/Intermediate	Niwot, CO	All Clear Update 89 days ago	20
0.3 mi 0.5 km Short Stack Intermediate Nederland, CO	Intermediate	Nederland, CO	Unknown Update	5
0.6 mi 0.9 km Coal Seam Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update Dry 10 days ago	14
2.7 mi 4.4 km High Plains Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Dry 22 days ago	23
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 26 days ago	18
1.1 mi 1.8 km Cobalt Trail Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	All Clear Update Dry 19 days ago	4
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
2.6 mi 4.2 km Chapman Drive Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	Unknown Update	15
2.1 mi 3.3 km Interim Joder Trail Intermediate Niwot, CO	Intermediate	Niwot, CO	All Clear Update Dry 19 days ago	25
1.2 mi 1.9 km Kinnickinnick Loop Easy/Intermediate Nederland, CO	Easy/Intermediate	Nederland, CO	Unknown Update	5
1.0 mi 1.6 km Summer Snowshoe Intermediate Nederland, CO	Intermediate	Nederland, CO	Unknown Update	1
1.0 mi 1.7 km Josie Heath Trail Intermediate Coal Creek, CO	Intermediate	Coal Creek, CO	Unknown Update	8
3.7 mi 6.0 km Community Ditch Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Dry 22 days ago	26
0.1 mi 0.2 km Espresso 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
1.0 mi 1.6 km Observatory Trail #355 Intermediate Nederland, CO	Intermediate	Nederland, CO	Unknown Update	7
1.1 mi 1.7 km Reboot Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	All Clear Update Dry 35 days ago	8
0.4 mi 0.6 km Hobbit 3 #927 Intermediate Nederland, CO	Intermediate	Nederland, CO	Unknown Update	12
0.5 mi 0.9 km Sunset Ridge Easy/Intermediate Erie, CO	Easy/Intermediate	Erie, CO	Unknown Update	11
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
0.8 mi 1.3 km Whoop-Di-Doos Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	All Clear Update 10 days ago	8
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	All Clear Update Dry 31 days ago	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	15
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	Unknown Update	12
2.3 mi 3.8 km Meadowlark Easy Superior, CO	Easy	Superior, CO	Bad / Closed Update closed for cattles 5 days ago	13
0.6 mi 0.9 km Lookout Trail #926 Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	All Clear Update 10 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
3.2 mi 5.1 km Eagle Easy/Intermediate Gunbarrel, CO	Easy/Intermediate	Gunbarrel, CO	Unknown Update	12
1.4 mi 2.3 km Greenbelt Plateau Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Dry 47 days ago	18
2.8 mi 4.5 km Coalton Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update 5 days ago	20
1.1 mi 1.8 km Prairie Vista Easy Superior, CO	Easy	Superior, CO	Unknown Update	14
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	All Clear Update 47 days ago	8
2.3 mi 3.6 km Waldrop Trail Difficult Nederland, CO	Difficult	Nederland, CO	Unknown Update	10
0.5 mi 0.7 km Erie Forest Easy/Intermediate Erie, CO	Easy/Intermediate	Erie, CO	Unknown Update	11
1.2 mi 1.9 km Flatirons Vista North Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	Unknown Update	14
3.4 mi 5.4 km South Boulder Creek Trail Easy Boulder, CO	Easy	Boulder, CO	Unknown Update	6
0.6 mi 1.0 km Quartz Valley Trail Easy Central City, CO	Easy	Central City, CO	All Clear Update Dry 12 days ago	8
2.1 mi 3.3 km CU South Campus Easy Boulder, CO	Easy	Boulder, CO	Unknown Update	4
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 17 days ago	3
3.7 mi 6.0 km Niwot Loop - Lower Section Easy Niwot, CO	Easy	Niwot, CO	All Clear Update 56 days ago	2
1.5 mi 2.4 km 355.1D Easy Nederland, CO	Easy	Nederland, CO	Unknown Update	2
2.3 mi 3.6 km Niwot Loop - Niwot High School Trail Easy Niwot, CO	Easy	Niwot, CO	All Clear Update 56 days ago	1
2.5 mi 4.1 km Niwot Loop - Upper Section Easy Niwot, CO	Easy	Niwot, CO	All Clear Update 56 days ago	1
0.8 mi 1.3 km Cowdrey Draw Easy Superior, CO	Easy	Superior, CO	Unknown Update	9
0.9 mi 1.5 km Rock Creek Trail Easy Broomfield, CO	Easy	Broomfield, CO	Unknown Update	5
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	All Clear Update 56 days ago	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	All Clear Update 56 days ago	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	Minor Issues Update 19 days ago	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 19 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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