117 Trails in Boulder County, Colorado

Trail Name Difficulty Length (mi) Rating City
Stillwater Pass difficulty 110.0 ***** Grand Lake
Golden Gate Canyon State Park Advanced difficulty 35.0 **** Golden
Horsetooth Mountain Park Advanced difficulty 30 **** Fort Collins
Rogers Pass difficulty 28.0 Winter Park
Pavilion Point / Silverdale / Silver Creek / Empire Pass difficulty 27.0 Georgetown
CDT: High Lonesome / Caribou / Strawberry West Trail difficulty 27.0 Fraser
James Peak Intermediate difficulty 27.0 ***** Winter Park
Trestle Bike Park Advanced difficulty 25.0 ***** Fraser
St Vrain River Trail difficulty 23.0 Longmont
St Vrain River Trail difficulty 23.0 Longmont
Bon Scott difficulty 23.0 Boulder
Strawberry / Doe Creek Advanced difficulty 22.0 ***** Winter Park
Tipperary Creek Loop Intermediate difficulty 20.0 ***** Fraser
Granby Ranch Bike Park Advanced difficulty 20.0 **** Granby
Elk Creek difficulty 20.0 Fraser
Snow Mountain Ranch -- YMCA of the Rockies Beginner difficulty 20.0 *** Granby
Lobo Trail Easiest difficulty 18 *** Longmont to Boulder
Chainsaw difficulty 18.0 Fraser
CDT: Berthoud Pass to Herman Gulch difficulty 18.0 Berthoud Falls
Warren Gulch Advanced difficulty 17.0 *** Idaho Springs
Broken Thumb difficulty 17.0 Winter Park
Marshall Mesa Area Beginner difficulty 16.0 *** Boulder
Blue Sky Intermediate difficulty 15.0 **** Fort Collins
Northwest Passage / Tipperary / Spruce Creek / Flume Intermediate difficulty 15.0 **** Fraser
Rollins Pass Beginner difficulty 15.0 *** Rollinsville
White Ranch Advanced difficulty 14.0 **** Golden
Heil Valley Ranch Intermediate difficulty 14.0 **** Boulder
Bunce School Road To T33 Crash Site difficulty 14.0 Allenspark
River Trail (Grand Lake Rec Trails) difficulty 14.0 Grand Lake
Phases difficulty 14 Tabernash
Centennial Cone Park Intermediate difficulty 13.0 **** Idaho Springs
Sourdough Trail Intermediate difficulty 12.0 **** Ward
Pavilion Point Loop difficulty 12.0 Georgetown
Saxon Mountain Advanced difficulty 12.0 *** Georgetown
Caribou Flats difficulty 12.0 Eldora
Maryland Mountain Advanced difficulty 12 **** Black Hawk
Virginia Canyon Mountain Park Expert difficulty 11 ***** Idaho Springs
Picture Rock Trail (Heil Valley Ranch) Intermediate difficulty 11.0 **** Lyons
Johnny Park Road difficulty 11.0 Estes Park
Blue Sky difficulty 11.0 Winter Park
Chimney Gulch Advanced difficulty 10.0 **** Golden
Crosier Mountain Expert difficulty 10.0 *** Drake
Coal Creek Trail Easiest difficulty 10.0 *** Louisville
South Saint Vrain Advanced difficulty 10.0 **** Ward
North Table Mountain Intermediate difficulty 10.0 *** Golden
Buchanan Pass Advanced difficulty 10.0 ***** Ward
Idlewild Trail System Advanced difficulty 10 ***** Winter Park
Grand Lake Rec Trails (Stillwater Pass) difficulty 10.0 Grand Lake
Dirty Bismarck Easiest difficulty 10.0 *** Superior
WTB difficulty 10.0 Winter Park

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