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	All Clear Update Dry 2 days ago	310
7.1 mi 11.5 km Betasso Preserve Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update 1 day ago	378
8.0 mi 12.8 km West Magnolia Tour Intermediate Nederland, CO	Intermediate	Nederland, CO	Unknown Update	102
7.8 mi 12.6 km Walker Ranch Difficult Coal Creek, CO	Difficult	Coal Creek, CO	Minor Issues Update Mostly Dry - A couple icy patches but 99% dry and good to go 12 days ago	304
13.1 mi 21.1 km West Mag Backcountry Big Ride Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	100
10.4 mi 16.8 km Marshall Mesa - Doudy Draw Loops Intermediate Superior, CO	Intermediate	Superior, CO	Unknown Update	134
15.1 mi 24.4 km Picture Rock/Wild Turkey Loop Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update Dry 4 days ago	149
16.3 mi 26.2 km Super Betasso Intermediate/Difficult Boulder, CO	Intermediate/Difficult	Boulder, CO	All Clear Update 1 day ago	79
12.6 mi 20.2 km Spring Brook Loop Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update Dry 4 hours ago	147
8.9 mi 14.3 km Heil Ranch Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update 15 days ago	223
15.7 mi 25.2 km Dirty Bismark Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update Consistently windy and lacking cover enough to be of note. Riding against the wind can be a significant impediment. 1 day ago	281
16.3 mi 26.2 km South Saint Vrain Figure 8 Difficult Nederland, CO	Difficult	Nederland, CO	Unknown Update	69
10.1 mi 16.3 km Ride like a Moto Difficult Niwot, CO	Difficult	Niwot, CO	All Clear Update Mostly Dry, Some Mud - Occasionally mud spots in the more shaded areas otherwise it's good to rip. 14 days ago	57
6.7 mi 10.8 km Post Work Sunset Ride Intermediate Erie, CO	Intermediate	Erie, CO	Unknown Update	46
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	All Clear Update 16 days ago	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	4
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	20
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 25 days ago	20
13.9 mi 22.4 km Heil Outer Loop from Corral TH Intermediate/Difficult Lyons, CO	Intermediate/Difficult	Lyons, CO	Unknown Update	5
11.2 mi 18.1 km Chapman Drive Out-And-Back Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	Unknown Update	19

2.5 mi 4.0 km Bitterbrush - Lower Section Difficult Lyons, CO	Difficult	Lyons, CO	Minor Issues Update Snowy, Some Mud 44 days ago	97
5.3 mi 8.5 km Picture Rock Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update Dry 8 days ago	133
2.2 mi 3.6 km Nelson Loop Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update 13 days ago	73
1.2 mi 1.9 km Betasso Link Trail Difficult Boulder, CO	Difficult	Boulder, CO	All Clear Update 1 day ago	90
3.3 mi 5.3 km Canyon Loop Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update 1 day ago	68
2.3 mi 3.7 km Benjamin Loop Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update 1 day ago	45
1.4 mi 2.2 km Bitterbrush - Upper Section Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update 13 days ago	49
1.0 mi 1.6 km Antelope Trail Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update Dry 2 days ago	50
1.1 mi 1.8 km Fast Money Intermediate Central City, CO	Intermediate	Central City, CO	Unknown Update	31
3.1 mi 5.0 km Wapiti Trail Intermediate/Difficult Lyons, CO	Intermediate/Difficult	Lyons, CO	All Clear Update 15 days ago	58
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	51
5.9 mi 9.5 km South Sourdough (#835) Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	42
3.0 mi 4.8 km Wild Turkey Trail Intermediate Lyons, CO	Intermediate	Lyons, CO	Unknown Update	42
0.7 mi 1.0 km Black Line Difficult Erie, CO	Difficult	Erie, CO	All Clear Update Dry 9 days ago	28
3.2 mi 5.2 km School Bus #929 Intermediate Nederland, CO	Intermediate	Nederland, CO	Unknown Update	28
0.1 mi 0.2 km Dual Slalom Intermediate/Difficult Boulder, CO	Intermediate/Difficult	Boulder, CO	Bad / Closed Update Snowy - Closed some snow 39 days ago	11
2.7 mi 4.3 km Ponderosa Loop Intermediate Lyons, CO	Intermediate	Lyons, CO	Unknown Update	42
2.2 mi 3.5 km Doudy Draw Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update Dry 3 days ago	40
0.1 mi 0.2 km XL Slopestyle Very Difficult Boulder, CO	Very Difficult	Boulder, CO	Bad / Closed Update Snowy - Closed some snow 39 days ago	8
0.1 mi 0.2 km Large Slopestyle Difficult Boulder, CO	Difficult	Boulder, CO	Bad / Closed Update Snowy - Closed some snow 39 days ago	10
0.1 mi 0.2 km Corkscrew Intermediate Boulder, CO	Intermediate	Boulder, CO	Bad / Closed Update Snowy - Closed some snow 39 days ago	12
1.5 mi 2.4 km Aspen Alley Trail #342A Intermediate Nederland, CO	Intermediate	Nederland, CO	Unknown Update	20
0.8 mi 1.3 km Schoolhouse Loop Easy Lyons, CO	Easy	Lyons, CO	All Clear Update Mostly Dry 68 days ago	13
0.1 mi 0.1 km Medium Slopestyle Intermediate/Difficult Boulder, CO	Intermediate/Difficult	Boulder, CO	Bad / Closed Update Snowy - Closed some snow 39 days ago	8
2.3 mi 3.7 km Spring Brook Loop North Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update 9 days ago	31
1.9 mi 3.0 km Re-Root #927 Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	20
0.5 mi 0.9 km Lower Fast Money Intermediate/Difficult Central City, CO	Intermediate/Difficult	Central City, CO	Unknown Update	1
0.4 mi 0.6 km Skills Loop Easy/Intermediate Lyons, CO	Easy/Intermediate	Lyons, CO	All Clear Update 15 days ago	5
0.8 mi 1.3 km Fourmile Link Intermediate Boulder, CO	Intermediate	Boulder, CO	Unknown Update	23
0.7 mi 1.1 km Blue Trail Intermediate Erie, CO	Intermediate	Erie, CO	All Clear Update Dry 15 days ago	23
0.1 mi 0.2 km Small Slopestyle Intermediate Boulder, CO	Intermediate	Boulder, CO	Bad / Closed Update Snowy - Closed some snow 39 days ago	9
0.7 mi 1.2 km Green Trail Easy/Intermediate Erie, CO	Easy/Intermediate	Erie, CO	All Clear Update Dry 15 days ago	20
0.3 mi 0.5 km Short Stack Intermediate Nederland, CO	Intermediate	Nederland, CO	Unknown Update	3
1.1 mi 1.8 km Spring Brook Loop South Intermediate Boulder, CO	Intermediate	Boulder, CO	Bad / Closed Update Muddy - The rain on Christmas Day turned the lead up to the loop into an unrideable peanut butter mess . 87 days ago	29
0.6 mi 1.0 km The Glades - Outer Loop Intermediate Boulder, CO	Intermediate	Boulder, CO	Bad / Closed Update Snowy - Closed some snow 39 days ago	9
1.7 mi 2.8 km Little Raven Trail Difficult Nederland, CO	Difficult	Nederland, CO	Unknown Update	14
4.2 mi 6.7 km Hobbit Intermediate Nederland, CO	Intermediate	Nederland, CO	Unknown Update	13
1.9 mi 3.1 km Ceran Saint Vrain #801 Intermediate/Difficult Nederland, CO	Intermediate/Difficult	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	16
3.9 mi 6.2 km North Sky Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	All Clear Update Mostly Dry 85 days ago	11
4.9 mi 7.9 km Kinglet Intermediate Nederland, CO	Intermediate	Nederland, CO	Unknown Update	7
2.7 mi 4.4 km High Plains Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Consistently windy and lacking cover enough to be of note. Riding against the wind can be a significant impediment. 1 day ago	21
0.3 mi 0.5 km Dirt 101 Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	Bad / Closed Update Snowy - Closed some snow 39 days ago	5
0.9 mi 1.4 km Marshall Valley Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update Dry 5 days ago	17
0.6 mi 0.9 km Coal Seam Intermediate Superior, CO	Intermediate	Superior, CO	Unknown Update	13
2.9 mi 4.7 km Left Hand Easy/Intermediate Niwot, CO	Easy/Intermediate	Niwot, CO	All Clear Update Dry 16 days ago	17
2.1 mi 3.4 km Flatirons Vista South Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	Unknown Update	26
1.0 mi 1.7 km Josie Heath Trail Intermediate Coal Creek, CO	Intermediate	Coal Creek, CO	Unknown Update	7
1.2 mi 1.9 km Kinnickinnick Loop Easy/Intermediate Nederland, CO	Easy/Intermediate	Nederland, CO	Unknown Update	5
1.1 mi 1.8 km Cobalt Trail Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	All Clear Update Mostly Dry 88 days ago	1
0.2 mi 0.3 km Skillz Loop Easy Boulder, CO	Easy	Boulder, CO	Bad / Closed Update Snowy - Closed some snow 39 days ago	6
2.6 mi 4.2 km Chapman Drive Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	Unknown Update	14
1.0 mi 1.6 km Observatory Trail #355 Intermediate Nederland, CO	Intermediate	Nederland, CO	Unknown Update	4
3.7 mi 6.0 km Community Ditch Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Dry 5 days ago	25
2.1 mi 3.3 km Interim Joder Trail Intermediate Niwot, CO	Intermediate	Niwot, CO	Unknown Update	22
2.3 mi 3.7 km Wapiti Trail Difficult Nederland, CO	Difficult	Nederland, CO	Unknown Update	7
0.4 mi 0.6 km Hobbit 3 #927 Intermediate Nederland, CO	Intermediate	Nederland, CO	Unknown Update	12
0.4 mi 0.6 km Hotlap Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	Bad / Closed Update Snowy - Closed some snow 39 days ago	5
0.9 mi 1.4 km Tungsten Loop Easy Nederland, CO	Easy	Nederland, CO	Unknown Update	6
2.6 mi 4.2 km Meyers Homestead Trail Easy/Intermediate Coal Creek, CO	Easy/Intermediate	Coal Creek, CO	Unknown Update	13
5.9 mi 9.5 km Boulder Creek Path Easy Boulder, CO	Easy	Boulder, CO	Unknown Update	16
2.6 mi 4.2 km Winiger Ridge Trail Intermediate/Difficult Coal Creek, CO	Intermediate/Difficult	Coal Creek, CO	Unknown Update	6
1.3 mi 2.1 km Foothills South Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	Unknown Update	11
0.8 mi 1.3 km Whoop-Di-Doos Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	7
2.1 mi 3.3 km East Boulder Trail - White Rocks Section Easy/Intermediate Gunbarrel, CO	Easy/Intermediate	Gunbarrel, CO	Unknown Update	6
1.1 mi 1.7 km Reboot Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	6
0.5 mi 0.9 km Sunset Ridge Easy/Intermediate Erie, CO	Easy/Intermediate	Erie, CO	All Clear Update Dry - All this stuff is in great shape right now. Dry and a hair soft with grip to spare. Try to avoid the incessant wind. 92 days ago	10
2.9 mi 4.6 km Blue Dot Trail (#606.1) Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	7
1.9 mi 3.0 km Sage Easy Gunbarrel, CO	Easy	Gunbarrel, CO	Unknown Update	10
0.7 mi 1.1 km Boot Intermediate Nederland, CO	Intermediate	Nederland, CO	Unknown Update	3
2.0 mi 3.2 km Cottonwood Trail Easy Gunbarrel, CO	Easy	Gunbarrel, CO	Bad / Closed Update Snowy - Closed some snow 39 days ago	3
0.1 mi 0.2 km Espresso Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	Bad / Closed Update Snowy - Closed some snow 39 days ago	3
3.6 mi 5.7 km Boulder Reservoir Easy Gunbarrel, CO	Easy	Gunbarrel, CO	Unknown Update	4
0.6 mi 0.9 km Lookout Trail #926 Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	12
8.8 mi 14.2 km Lake Link Trail Easy/Intermediate Broomfield, CO	Easy/Intermediate	Broomfield, CO	Unknown Update	8
1.1 mi 1.8 km Prairie Vista Easy Superior, CO	Easy	Superior, CO	Unknown Update	14
2.3 mi 3.6 km Waldrop Trail Difficult Nederland, CO	Difficult	Nederland, CO	Minor Issues Update Snowy 80 days ago	10
2.8 mi 4.5 km Coalton Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	Unknown Update	18
3.2 mi 5.1 km Eagle Easy/Intermediate Gunbarrel, CO	Easy/Intermediate	Gunbarrel, CO	Unknown Update	13
1.4 mi 2.3 km Greenbelt Plateau Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Dry 3 days ago	17
2.3 mi 3.8 km Meadowlark Easy Superior, CO	Easy	Superior, CO	Unknown Update	10
0.9 mi 1.5 km Little Thompson Overlook Intermediate/Difficult Lyons, CO	Intermediate/Difficult	Lyons, CO	Unknown Update	13
0.5 mi 0.7 km Erie Forest Easy/Intermediate Erie, CO	Easy/Intermediate	Erie, CO	All Clear Update Dry - All this stuff is in great shape right now. Dry and a hair soft with grip to spare. Try to avoid the incessant wind. 92 days ago	10
1.2 mi 1.9 km Flatirons Vista North Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Dry 3 days ago	13
3.7 mi 6.0 km Niwot Loop - Lower Section Easy Niwot, CO	Easy	Niwot, CO	All Clear Update Dry 46 days ago	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
3.4 mi 5.4 km South Boulder Creek Trail Easy Boulder, CO	Easy	Boulder, CO	Unknown Update	5
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 5 days ago	9
0.9 mi 1.5 km Rock Creek Trail Easy Broomfield, CO	Easy	Broomfield, CO	All Clear Update Dry 16 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
3.3 mi 5.3 km Rock Creek Trail Easy Lafayette, CO	Easy	Lafayette, CO	Unknown Update	2
1.3 mi 2.0 km Cottontail Trail Easy Gunbarrel, CO	Easy	Gunbarrel, CO	Unknown Update	2
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	All Clear Update Dry 11 days ago	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
2.4 mi 3.8 km 355.1 Easy/Intermediate Nederland, CO	Easy/Intermediate	Nederland, 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
1.6 mi 2.5 km North Rim Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	Unknown Update	5
0.4 mi 0.7 km 355.1A Easy Nederland, CO	Easy	Nederland, CO	Unknown Update	2
1.7 mi 2.7 km Indian Mesa Easy Lyons, CO	Easy	Lyons, CO	Unknown Update	5
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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