About mountain biking in Boulder County

Boulder County, Colorado has 399 named trails tagged for mountain biking, covering 764 miles, an average of 1.9 miles each. The longest is Sourdough Trail, at 24.6 miles. 35 run 5 miles or longer.

What the mountain biking trails in Boulder County are like

By length, 224 are under a mile, 140 run 1 to 5 miles, and 35 are 5 miles or longer. 31 are loops, ending where they start; the longest is Picture Rock Trail, at 10.4 miles.

Every one carries a difficulty rating: 238 easy, 107 moderate, and 54 hard. Of the 392 with measured elevation, Buchanan Pass Trail climbs the most, about 4,590 ft, and 20 gain 1,000 ft or more.

Mountain Biking Trails — page 1 of 2

Sourdough TrailHikeMTB24.6 mi B360MTB22.6 mi Longmont-to-Boulder (LOBO) Regional TrailMTB19.9 mi Marshall MesaMTB18.4 mi Longmont Loop - SouthMTB17.7 mi Heil Valley RanchMTB17.3 mi Walker Ranch LoopMTB15.2 mi Boulder Creek PathMTB13.7 mi Left Hand OHV TrailsMTB13.6 mi South Boulder Creek TrailMTB12.1 mi Boulder Valley RanchMTB10.6 mi Picture Rock TrailHikeMTB10.4 mi B180MTB10.3 mi Coal Creek TrailHikeMTB10.2 mi Wapiti TrailMTB9.7 mi Niwot Loop TrailHikeMTB9.3 mi Buchanan Pass TrailHikeMTB8.9 mi Rock Creek TrailHikeMTB8.8 mi East Boulder TrailMTB8.2 mi Betasso Preserve Trail NetwokMTB8.1 mi HobbitMTB8.0 mi Bitterbrush TrailMTB7.6 mi South Saint VrainMTB7.3 mi Saint Vrain GreenwayMTB7.2 mi Hall RanchMTB7.0 mi Switzerland Trail Colorado and North Western Rail RoadHikeMTB6.8 mi Broadway PathMTB6.8 mi Oligarchy Ditch TrailHikeMTB6.8 mi Canyon LoopHikeMTB6.4 mi Dry Creek TrailHikeMTB6.3 mi Foothills Parkway PathMTB6.3 mi Little Raven TrailMTB6.2 mi Blue DotMTB6.1 mi Eagle Wind TrailMTB6.0 mi bicycleMTB5.1 mi Open Sky LoopHikeMTB4.9 mi RattleSnake Gulch TrailMTB4.9 mi Mountain View Ave.MTB4.8 mi Davidson MesaMTB4.5 mi Goose Creek GreenwayMTB4.5 mi Baseline Bike RouteMTB4.4 mi Rough and Ready Ditch TrailMTB4.1 mi Coney Creek RoadMTB4.0 mi Wonderland Creek GreenwayHikeMTB3.9 mi Meadowlark TrailHikeMTB3.7 mi North Sky TrailHikeMTB3.7 mi Airport RoadMTB3.6 mi Mayhoffer TrailMTB3.6 mi County Road 92JMTB3.6 mi Re-RootMTB3.4 mi Indian Mesa TrailHikeMTB3.4 mi South Saint Vrain TrailHikeMTB3.4 mi Colorado Ave bike routeMTB3.3 mi Community Ditch TrailHikeMTB3.2 mi Davidson Mesa TrailHikeMTB3.0 mi Left Hand Creek TrailHikeMTB3.0 mi Eagle TrailHikeMTB3.0 mi Left Hand TrailHikeMTB3.0 mi Miller RockHikeMTB2.9 mi Lower Pixie DuffHikeMTB2.9 mi Wild TurkeyMTB2.9 mi Wild Turkey Loop TrailHikeMTB2.9 mi 28th Street Bike RouteMTB2.9 mi Coalton TrailHikeMTB2.8 mi Powerline TrailHikeMTB2.7 mi High Plains TrailHikeMTB2.7 mi Winiger Ridge TrailHikeMTB2.7 mi Taylor Mountain SpurHikeMTB2.6 mi McCaslin TrailHikeMTB2.6 mi Clover Basin DrMTB2.6 mi Meyer's Homestead TrailHikeMTB2.6 mi Boy Scout SpurHikeMTB2.6 mi Ponderosa Loop TrailHikeMTB2.6 mi Foothills Parkway Multi-Use PathHikeMTB2.5 mi Niwot Ridge TrailHikeMTB2.5 mi Hobbit 2HikeMTB2.5 mi Erie Loop TrailHikeMTB2.4 mi Wonderland Lake TrailHikeMTB2.4 mi Betasso Link TrailMTB2.4 mi Boulder Canyon TrailHikeMTB2.3 mi Chapman DriveHikeMTB2.3 mi Pipeline TrailHikeMTB2.3 mi East Boulder - White Rocks TrailHikeMTB2.3 mi Benjamin LoopMTB2.3 mi Benjamin Trail LoopHikeMTB2.3 mi RebootHikeMTB2.2 mi Nelson LoopHikeMTB2.2 mi Waldrop TrailHikeMTB2.2 mi Nelson Loop TrailMTB2.2 mi Overland Loop TrailHikeMTB2.2 mi Spring Brook Loop North TrailHikeMTB2.2 mi Lykins Gulch / Supply Ditch TrailMTB2.2 mi Button Rock Mountain LoopHikeMTB2.2 mi Doudy Draw TrailHikeMTB2.2 mi Bear Creek GreenwayHikeMTB2.2 mi East Boulder - Teller Farm TrailHikeMTB2.1 mi ManagersHikeMTB2.1 mi Bear Creek PathMTB2.1 mi East Boulder - Gunbarrel TrailHikeMTB2.1 mi North Sheep Mountain TrailHikeMTB2.1 mi Josie Heath TrailMTB2.1 mi Fourmile Canyon Creek PathHikeMTB2.0 mi East Boulder Community Park pathHikeMTB2.0 mi Apache TrailMTB1.9 mi Antelope TrailMTB1.9 mi Little Thompson Overlook TrailMTB1.9 mi Sugar MagnoliaMTB1.8 mi Sage TrailHikeMTB1.8 mi Left Hand Reservoir RoadHikeMTB1.8 mi Willows TrailHikeMTB1.8 mi Mary Miller TrailHikeMTB1.7 mi Walden PondsHikeMTB1.7 mi Taylor MountainHikeMTB1.7 mi Bright TrailHikeMTB1.7 mi Left Hand Main TrailHikeMTB1.7 mi Hover / Ken PrattMTB1.7 mi ObservatoryMTB1.7 mi Guinn Mountain TrailHikeMTB1.6 mi Burning BushHikeMTB1.6 mi Fourmile Link TrailMTB1.6 mi Moorhead Bike RouteMTB1.6 mi NeverlandHikeMTB1.6 mi Dry Saint Vrain TrailHikeMTB1.6 mi Greenbelt Plateau TrailHikeMTB1.6 mi Harney LastokaHikeMTB1.5 mi 28th Street PathHikeMTB1.5 mi North Rim TrailHikeMTB1.5 mi Forsythe Canyon TrailHikeMTB1.5 mi Hidden ValleyHikeMTB1.5 mi Four Mile Creek TrailMTB1.5 mi The Righteous PathHikeMTB1.5 mi Cradleboard TrailHikeMTB1.5 mi Aspen Alley TrailHikeMTB1.5 mi David Lee RothHikeMTB1.5 mi Fowler TrailHikeMTB1.5 mi Legend Ridge LoopHikeMTB1.5 mi Aspen AlleyMTB1.4 mi Fireman Hill TrailHikeMTB1.4 mi PipelineHikeMTB1.4 mi Hobbit 3MTB1.4 mi Crash'nHikeMTB1.4 mi New 1HikeMTB1.4 mi Dry Creek Dr.MTB1.4 mi Singletree TrailMTB1.4 mi Joder Ranch TrailHikeMTB1.4 mi Rocks and RootsHikeMTB1.4 mi Upper Pixie DuffHikeMTB1.4 mi Lookout TrailHikeMTB1.3 mi Hidden Star TrailHikeMTB1.3 mi Elmer's Two MileMTB1.3 mi Cottonwood TrailHikeMTB1.3 mi The GrindHikeMTB1.3 mi Jenny Creek TrailHikeMTB1.3 mi Rattelsnake XCHikeMTB1.3 mi Overbrook TrailHikeMTB1.3 mi Fuzzy SpiritHikeMTB1.3 mi SherwoodHikeMTB1.3 mi Lykins Gulch TrailHikeMTB1.3 mi ArkansasHikeMTB1.3 mi Middle Saint Vrain TrailHikeMTB1.2 mi Foothills North TrailHikeMTB1.2 mi Marshall Valley TrailHikeMTB1.2 mi Coney Non-Motorized SpurHikeMTB1.2 mi Waneka Lake TrailHikeMTB1.2 mi Elk TrickleHikeMTB1.2 mi Prairie Vista TrailHikeMTB1.1 mi Kinnickinnick LoopHikeMTB1.1 mi Somerset TrailHikeMTB1.1 mi Spring Brook Loop South TrailHikeMTB1.1 mi Murder HorseHikeMTB1.1 mi Cobalt TrailHikeMTB1.1 mi FudgepackerHikeMTB1.0 mi Cowdrey Draw TrailHikeMTB1.0 mi Skunk Creek GreenwayHikeMTB1.0 mi Fourmile Creek TrailHikeMTB1.0 mi Schoolhouse LoopHikeMTB1.0 mi Canyon RimHikeMTB1.0 mi Summer SnowshoeHikeMTB1.0 mi Star WarsHikeMTB1.0 mi Bon Scott TrailHikeMTB1.0 mi City of Lafayette TrailHikeMTB1.0 mi Kensington Ditch TrailHikeMTB1.0 mi Foothills SouthHikeMTB0.9 mi Summer RoadHikeMTB0.9 mi Pearl Parkway Multi-Use PathHikeMTB0.9 mi Centennial TrailHikeMTB0.9 mi Winiger Spur RoadHikeMTB0.9 mi Leon Wurl TrailHikeMTB0.9 mi Lincoln LogHikeMTB0.9 mi Valmont Multi-Use PathHikeMTB0.9 mi Ruth Roberts Connector TrailHikeMTB0.9 mi FlatIrons Vista North TrailHikeMTB0.9 mi The GladesMTB0.9 mi Ethel Harrold RoadMTB0.9 mi Lagerman TrailHikeMTB0.9 mi Tantra Park PathHikeMTB0.8 mi Devil's Thumb TrailHikeMTB0.8 mi A-Lodge ConnectorHikeMTB0.8 mi US 36 Bikeway Park-N-Ride West ConnectorHikeMTB0.8 mi Four Mile Creek PathHikeMTB0.8 mi Cottonwood PathHikeMTB0.8 mi Tucker Meadow TrailHikeMTB0.8 mi Spruce Gulch Single TrackHikeMTB0.8 mi Elmer's Two Mile Bike PathHikeMTB0.8 mi Whoopp-Di-DoosHikeMTB0.8 mi Whoopp-Di-DosMTB0.8 mi Kendall's KornerHikeMTB0.8 mi Tungsten LoopHikeMTB0.8 mi Cougar TrailHikeMTB0.8 mi Baughmans Gulley Single Track TrailHikeMTB0.8 mi Baptiste TrailHikeMTB0.7 mi Coal Seam TrailHikeMTB0.7 mi Sawmill Gulch CutoffMTB0.7 mi Black SlabbathHikeMTB0.7 mi Caribou Ranch LinkHikeMTB0.7 mi Levee TrailHikeMTB0.7 mi Beaver Reservoir Cutoff TrailHikeMTB0.7 mi Loop Link TrailHikeMTB0.7 mi Reach AroundHikeMTB0.7 mi Coney Flats RoadMTB0.7 mi Side TrailHikeMTB0.7 mi Wellman Canal PathHikeMTB0.7 mi Super VüHikeMTB0.7 mi BootHikeMTB0.7 mi Disc Dr.MTB0.7 mi WaterfallHikeMTB0.7 mi Walk The DogHikeMTB0.7 mi Niwot Hills TrailHikeMTB0.6 mi Boulder Reservoir TrailHikeMTB0.6 mi Wall Of Death Single Track TrailHikeMTB0.6 mi Twin Lakes TrailHikeMTB0.6 mi Colorado Ave South PathHikeMTB0.6 mi Grandview Meadows Dr.MTB0.6 mi FlatIrons Vista TrailHikeMTB0.6 mi Supply Ditch TrailHikeMTB0.6 mi Niwot Cutoff TrailHikeMTB0.6 mi Dog Trail/Doe TrailHikeMTB0.6 mi Community Park TrailHikeMTB0.6 mi Braly TrailsHikeMTB0.6 mi Boulder Reservoir Dam (South)HikeMTB0.6 mi Start The PartyHikeMTB0.6 mi Nw Haul Road TrailsHikeMTB0.6 mi Rought and Ready Ditch TrailHikeMTB0.6 mi Stink EyeHikeMTB0.6 mi CMC Cabin CutoffHikeMTB0.5 mi Brainard Lake Cutoff TrailHikeMTB0.5 mi Ethel Harrold ConnectorHikeMTB0.5 mi M&MHikeMTB0.5 mi Lost Meadow TrailHikeMTB0.5 mi Skunk Canyon PathHikeMTB0.5 mi Rabbit Mountain Access RoadMTB0.5 mi RZAHikeMTB0.5 mi Ginger BootyHikeMTB0.5 mi Beauty and the BeastHikeMTB0.5 mi Colorado Ave North PathHikeMTB0.5 mi Twin Saddles Single Track TrailHikeMTB0.5 mi DeggeHikeMTB0.5 mi Handshake TrailMTB0.5 mi Pleasant View PathHikeMTB0.5 mi Left Hand Access TrailHikeMTB0.5 mi BERT (Boulder to Erie Regional Trail)MTB0.5 mi Long Lake Connector TrailHikeMTB0.5 mi Boulder Reservoir Dam (North)HikeMTB0.5 mi US 36 Bikeway McCaslin Station South SpurHikeMTB0.5 mi Canyon Rim TrailHikeMTB0.5 mi DeadassHikeMTB0.5 mi Hobbit 3.5HikeMTB0.5 mi Cherryvale TrailHikeMTB0.4 mi Baughman'S Saddle Single Track TrailHikeMTB0.4 mi 22nd Street PathHikeMTB0.4 mi Fairview View RoadHikeMTB0.4 mi Castle CutoffHikeMTB0.4 mi Wonderland PathHikeMTB0.4 mi Golden Ponds TrailHikeMTB0.4 mi Mitchell Lake Trailhead Connector TrailHikeMTB0.4 mi Observatory TrailHikeMTB0.4 mi Baseline Road South PathHikeMTB0.4 mi GZAHikeMTB0.4 mi Museum Connector TrailHikeMTB0.4 mi Hot LapMTB0.4 mi Dirty GrandpaHikeMTB0.4 mi Coney Creek Road SpurMTB0.4 mi Observatory SpurMTB0.4 mi Skills LoopHikeMTB0.4 mi YMCA CampHikeMTB0.4 mi Saint Vrain TrailHikeMTB0.4 mi BonusHikeMTB0.4 mi Start/FinishHikeMTB0.4 mi Baseline Road North PathHikeMTB0.4 mi Social 41HikeMTB0.4 mi Thunderbird pathHikeMTB0.4 mi Upper Ridge Single Track TrailHikeMTB0.4 mi Zis Side, Zat SideHikeMTB0.4 mi Farmer's Ditch PathHikeMTB0.4 mi Social 5HikeMTB0.3 mi Skinny PeteHikeMTB0.3 mi Horseshoe CreekHikeMTB0.3 mi Cockerell DriveHikeMTB0.3 mi Out of The GateHikeMTB0.3 mi Powerline Trail CorridorHikeMTB0.3 mi

← All Boulder County trails

Trail geometry from OpenStreetMap contributors, licensed ODbL. Elevation from the USGS 3D Elevation Program. Compiled and published by Trailmonger · trail data last rebuilt October 25, 2026.