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.

7.1 mi 11.5 km Betasso Preserve Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update Dry 3 days ago	371
8.0 mi 12.8 km West Magnolia Tour Intermediate Nederland, CO	Intermediate	Nederland, CO	Minor Issues Update Mostly Dry 19 days ago	99
11.8 mi 18.9 km Hall Ranch Difficult Lyons, CO	Difficult	Lyons, CO	All Clear Update 26 days ago	309
13.1 mi 21.1 km West Mag Backcountry Big Ride Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	All Clear Update Dry 13 days ago	98
7.8 mi 12.6 km Walker Ranch Difficult Coal Creek, CO	Difficult	Coal Creek, CO	All Clear Update Mostly Dry, Some Mud 8 days ago	302
10.4 mi 16.8 km Marshall Mesa - Doudy Draw Loops Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update Dry 7 days ago	132
15.1 mi 24.4 km Picture Rock/Wild Turkey Loop Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update Dry 7 days ago	146
12.6 mi 20.2 km Spring Brook Loop Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update Mostly Dry 6 days ago	144
16.3 mi 26.2 km Super Betasso Intermediate/Difficult Boulder, CO	Intermediate/Difficult	Boulder, CO	All Clear Update Dry - Very fun. Could park closer to avoid having to ride about 3-5 miles up the Boulder Canyon path 22 days ago	78
8.8 mi 14.2 km Heil Ranch Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update Dry - Some road work happening at top of fire road climb near new Wapiti entrance. 58 days ago	221
15.7 mi 25.2 km Dirty Bismark Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update Muddy 8 days ago	278
16.3 mi 26.2 km South Saint Vrain Figure 8 Difficult Nederland, CO	Difficult	Nederland, CO	Minor Issues Update Muddy - a few downed trees and snow drifts up by the lake 85 days ago	69
10.1 mi 16.3 km Ride like a Moto Difficult Niwot, CO	Difficult	Niwot, CO	All Clear Update Dry - Okay trail at best. Lots of hike-a-bike on the way up. Hard to navigate. But, the downhill is very fun. Good teeth-gritting descent that is best at full speed 57 days ago	56
6.7 mi 10.8 km Post Work Sunset Ride Intermediate Erie, CO	Intermediate	Erie, CO	All Clear Update Dry - Good amount of dog poop on the trail 56 days ago	46
10.3 mi 16.6 km Rhythm & Blues Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	All Clear Update Dry 61 days ago	33
34.1 mi 54.9 km Heil to Picture to Hall and Back Difficult Lyons, CO	Difficult	Lyons, CO	All Clear Update Dry 86 days ago	32
2.0 mi 3.2 km Valmont Bike Park - Singletrack Hotlap Intermediate Boulder, CO	Intermediate	Boulder, CO	Unknown Update	30
16.9 mi 27.1 km The Whole Casino Difficult Central City, CO	Difficult	Central City, CO	All Clear Update Dry - Good conditions 69 days ago	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	All Clear Update Dry 61 days ago	4
13.0 mi 21.0 km The N Bus Loop Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	All Clear Update Dry 27 days ago	9
13.9 mi 22.4 km Heil Outer Loop from Corral TH Intermediate/Difficult Lyons, CO	Intermediate/Difficult	Lyons, CO	Unknown Update	3
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	All Clear Update Dry 49 days ago	15
11.8 mi 18.9 km Rock Creek Farm Loop Easy Broomfield, CO	Easy	Broomfield, CO	All Clear Update 10 days ago	18
11.2 mi 18.1 km Chapman Drive Out-And-Back Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	All Clear Update Dry 97 days ago	18

2.5 mi 4.0 km Bitterbrush - Lower Section Difficult Lyons, CO	Difficult	Lyons, CO	All Clear Update Dry 6 days ago	97
5.3 mi 8.5 km Picture Rock Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update 22 days ago	132
2.2 mi 3.6 km Nelson Loop Intermediate Lyons, CO	Intermediate	Lyons, CO	Unknown Update	73
1.2 mi 1.9 km Betasso Link Trail Difficult Boulder, CO	Difficult	Boulder, CO	All Clear Update Dry 5 days ago	90
3.3 mi 5.3 km Canyon Loop Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update Dry 5 days ago	68
2.3 mi 3.7 km Benjamin Loop Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update Dry 5 days ago	45
1.4 mi 2.2 km Bitterbrush - Upper Section Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update Dry 6 days ago	49
1.0 mi 1.6 km Antelope Trail Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update Dry 53 days ago	50
1.1 mi 1.8 km Fast Money Intermediate Central City, CO	Intermediate	Central City, CO	All Clear Update Dry 1 day ago	31
3.1 mi 5.0 km Wapiti Trail Intermediate/Difficult Lyons, CO	Intermediate/Difficult	Lyons, CO	All Clear Update Dry 28 days ago	56
6.0 mi 9.7 km South Saint Vrain Trail (#909) Very Difficult Nederland, CO	Very Difficult	Nederland, CO	Unknown Update	32
3.0 mi 4.8 km Eagle Wind Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update Dry 86 days ago	50
5.9 mi 9.5 km South Sourdough (#835) Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Minor Issues Update Fallen Trees - 2 large get off your bike fallen trees but other than that the trail is in good shape 80 days ago	38
0.7 mi 1.0 km Black Line Difficult Erie, CO	Difficult	Erie, CO	All Clear Update Dry 51 days ago	28
3.0 mi 4.8 km Wild Turkey Trail Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update 22 days ago	40
0.1 mi 0.2 km Dual Slalom Intermediate/Difficult Boulder, CO	Intermediate/Difficult	Boulder, CO	All Clear Update 55 days ago	11
3.2 mi 5.2 km School Bus #929 Intermediate Nederland, CO	Intermediate	Nederland, CO	All Clear Update Dry 9 days ago	27
2.7 mi 4.3 km Ponderosa Loop Intermediate Lyons, CO	Intermediate	Lyons, CO	All Clear Update Dry 96 days ago	41
2.2 mi 3.5 km Doudy Draw Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update 20 hours ago	38
0.1 mi 0.2 km XL Slopestyle Very Difficult Boulder, CO	Very Difficult	Boulder, CO	Unknown Update	7
0.1 mi 0.2 km Large Slopestyle Difficult Boulder, CO	Difficult	Boulder, CO	Unknown Update	10
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 Dry 76 days ago	12
1.5 mi 2.4 km Aspen Alley Trail #342A Intermediate Nederland, CO	Intermediate	Nederland, CO	All Clear Update Dry 19 days ago	19
0.1 mi 0.1 km Medium Slopestyle Intermediate/Difficult Boulder, CO	Intermediate/Difficult	Boulder, CO	Unknown Update	8
2.3 mi 3.7 km Spring Brook Loop North Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update 20 hours ago	31
0.5 mi 0.9 km Lower Fast Money Intermediate/Difficult Central City, CO	Intermediate/Difficult	Central City, CO	All Clear Update Dry 19 days ago	1
0.4 mi 0.6 km Skills Loop Easy/Intermediate Lyons, CO	Easy/Intermediate	Lyons, CO	All Clear Update Dry 96 days ago	5
0.8 mi 1.3 km Fourmile Link Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update Dry 3 days ago	23
0.7 mi 1.1 km Blue Trail Intermediate Erie, CO	Intermediate	Erie, CO	Bad / Closed Update Closed as of July 21st due to conditions per signage and closed gates 54 days ago	23
0.1 mi 0.2 km Small Slopestyle Intermediate Boulder, CO	Intermediate	Boulder, CO	Unknown Update	9
0.7 mi 1.2 km Green Trail Easy/Intermediate Erie, CO	Easy/Intermediate	Erie, CO	Bad / Closed Update Closed as of July 21st due to conditions per signage and closed gates 54 days ago	20
1.9 mi 3.0 km Re-Root #927 Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	All Clear Update Dry 19 days ago	18
0.3 mi 0.5 km Short Stack Intermediate Nederland, CO	Intermediate	Nederland, CO	All Clear Update Dry 54 days ago	3
4.9 mi 7.9 km Kinglet Intermediate Nederland, CO	Intermediate	Nederland, CO	All Clear Update Dry 54 days ago	6
0.6 mi 1.0 km The Glades - Outer Loop Intermediate Boulder, CO	Intermediate	Boulder, CO	Unknown Update	9
1.1 mi 1.8 km Spring Brook Loop South Intermediate Boulder, CO	Intermediate	Boulder, CO	All Clear Update 20 hours ago	29
4.2 mi 6.7 km Hobbit Intermediate Nederland, CO	Intermediate	Nederland, CO	Minor Issues Update Mostly Dry 54 days ago	11
1.7 mi 2.8 km Little Raven Trail Difficult Nederland, CO	Difficult	Nederland, CO	Unknown Update	14
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	All Clear Update Dry 58 days ago	18
0.9 mi 1.5 km Sugar Magnolia #926 Difficult Nederland, CO	Difficult	Nederland, CO	All Clear Update Dry 19 days ago	16
2.7 mi 4.4 km High Plains Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Dry 9 days ago	20
0.3 mi 0.5 km Dirt 101 Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	Unknown Update	5
0.9 mi 1.4 km Marshall Valley Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update Dry 9 days ago	17
3.9 mi 6.2 km North Sky Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	All Clear Update 33 days ago	4
0.6 mi 0.9 km Coal Seam Intermediate Superior, CO	Intermediate	Superior, CO	All Clear Update Dry 20 hours ago	12
2.1 mi 3.4 km Flatirons Vista South Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Some Mud 31 days ago	26
2.9 mi 4.7 km Left Hand Easy/Intermediate Niwot, CO	Easy/Intermediate	Niwot, CO	All Clear Update 34 days ago	15
1.0 mi 1.7 km Josie Heath Trail Intermediate Coal Creek, CO	Intermediate	Coal Creek, CO	Unknown Update	7
2.6 mi 4.2 km Chapman Drive Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	All Clear Update Dry 26 days ago	13
0.2 mi 0.3 km Skillz Loop Easy Boulder, CO	Easy	Boulder, CO	Unknown Update	6
1.0 mi 1.6 km Observatory Trail #355 Intermediate Nederland, CO	Intermediate	Nederland, CO	All Clear Update Dry 27 days ago	4
2.3 mi 3.7 km Wapiti Trail Difficult Nederland, CO	Difficult	Nederland, CO	Unknown Update	7
2.1 mi 3.3 km Interim Joder Trail Intermediate Niwot, CO	Intermediate	Niwot, CO	Unknown Update	19
3.7 mi 6.0 km Community Ditch Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Dry 20 hours ago	24
0.4 mi 0.6 km Hobbit 3 #927 Intermediate Nederland, CO	Intermediate	Nederland, CO	All Clear Update Dry 19 days ago	11
2.6 mi 4.2 km Meyers Homestead Trail Easy/Intermediate Coal Creek, CO	Easy/Intermediate	Coal Creek, CO	All Clear Update Dry 83 days ago	13
0.4 mi 0.6 km Hotlap Easy Boulder, CO	Easy	Boulder, CO	Unknown Update	4
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
0.8 mi 1.3 km Whoop-Di-Doos Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	All Clear Update Dry 75 days ago	7
2.1 mi 3.3 km East Boulder Trail - White Rocks Section Easy/Intermediate Gunbarrel, CO	Easy/Intermediate	Gunbarrel, CO	All Clear Update Dry 68 days ago	6
1.1 mi 1.7 km Reboot Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	All Clear Update Dry 19 days ago	6
1.3 mi 2.1 km Foothills South Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	All Clear Update Dry 13 days ago	10
0.5 mi 0.9 km Sunset Ridge Easy/Intermediate Erie, CO	Easy/Intermediate	Erie, CO	All Clear Update Dry 4 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
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	Unknown Update	3
0.1 mi 0.2 km Espresso Easy/Intermediate Boulder, CO	Easy/Intermediate	Boulder, CO	Unknown Update	3
0.6 mi 0.9 km Lookout Trail #926 Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	All Clear Update Dry 16 days ago	12
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
1.1 mi 1.8 km Prairie Vista Easy Superior, CO	Easy	Superior, CO	All Clear Update Some Mud 31 days ago	13
2.3 mi 3.8 km Meadowlark Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Part close medowlark until 9/13/24. Cattle grazing 14 days ago	9
1.9 mi 3.0 km Sage Easy Gunbarrel, CO	Easy	Gunbarrel, CO	All Clear Update Dry 96 days ago	9
2.8 mi 4.5 km Coalton Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update 6 days ago	17
1.4 mi 2.3 km Greenbelt Plateau Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update 66 days ago	17
0.5 mi 0.7 km Erie Forest Easy/Intermediate Erie, CO	Easy/Intermediate	Erie, CO	Unknown Update	10
1.2 mi 1.9 km Flatirons Vista North Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Some Mud 31 days ago	12
3.6 mi 5.7 km Boulder Reservoir Easy Gunbarrel, CO	Easy	Gunbarrel, CO	Minor Issues Update Dry - first doubletrack off the reservoir was good on the south end. North was pretty rough and got eaten up by a ton of horse flys. could not recommend. also having to pay for this "trail" really made me realize I could do better. 72 days ago	3
1.2 mi 1.9 km Kinnickinnick Loop Easy/Intermediate Nederland, CO	Easy/Intermediate	Nederland, CO	All Clear Update 42 days ago	3
3.7 mi 6.0 km Niwot Loop - Lower Section Easy Niwot, CO	Easy	Niwot, CO	All Clear Update 7 days ago	2
0.9 mi 1.5 km Little Thompson Overlook Intermediate/Difficult Lyons, CO	Intermediate/Difficult	Lyons, CO	All Clear Update Dry 72 days ago	12
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	All Clear Update Dry 4 days ago	7
3.3 mi 5.3 km Rock Creek Trail Easy Lafayette, CO	Easy	Lafayette, CO	All Clear Update Dry 28 days ago	1
2.3 mi 3.6 km Niwot Loop - Niwot High School Trail Easy Niwot, CO	Easy	Niwot, CO	All Clear Update Dry 10 hours ago	1
2.5 mi 4.1 km Niwot Loop - Upper Section Easy Niwot, CO	Easy	Niwot, CO	All Clear Update 7 days ago	1
3.4 mi 5.4 km South Boulder Creek Trail Easy Boulder, CO	Easy	Boulder, CO	Unknown Update	4
0.9 mi 1.4 km Tungsten Loop Easy/Intermediate Nederland, CO	Easy/Intermediate	Nederland, CO	All Clear Update 42 days ago	4
0.8 mi 1.3 km Cowdrey Draw Easy/Intermediate Superior, CO	Easy/Intermediate	Superior, CO	All Clear Update Dry 41 days ago	9
0.9 mi 1.5 km Rock Creek Trail Easy Broomfield, CO	Easy	Broomfield, CO	All Clear Update Dry 46 days ago	5
2.1 mi 3.3 km CU South Campus Easy Boulder, CO	Easy	Boulder, CO	Unknown Update	3
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	All Clear Update Dry 93 days ago	5
1.9 mi 3.1 km Cottontail Trail - Gunbarrel Section Easy Gunbarrel, CO	Easy	Gunbarrel, CO	All Clear Update 7 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 Dry 55 days ago	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 10 hours ago	4
0.8 mi 1.3 km Red Dot Trail (#357.2B) Intermediate/Difficult Nederland, CO	Intermediate/Difficult	Nederland, CO	Unknown Update	4
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
1.6 mi 2.6 km Mary Miller Trail Easy Broomfield, CO	Easy	Broomfield, CO	All Clear Update 68 days ago	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	All Clear Update 71 days ago	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	All Clear Update Dry 68 days ago	1

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