Boulder County
County. Find your line here.
Trails772
Total length605 mi
Known loops18
Counts are trails in our data whose start point lies inside this boundary. A loop is counted only where the source marks it as one.
Search trails near Boulder County
Longest trails
Ordered by measured length. This is a simple fact, not a quality ranking.
Barker Reservoir Trail
0.87 miUnpavedDifficulty unknownLazy H Horse Trail Net
0.87 miGroundDifficulty unknownFox Creek Trail
0.87 miGroundDifficulty unknownSouth Shore Trail
0.86 miGroundDifficulty unknownMaryville Downhill
0.85 miDirtDifficulty unknownEast Boulder Community Park path
0.84 miConcreteDifficulty unknownGolden Meadow Trail
0.83 miGroundDifficulty unknownA-Lodge Connector
0.83 miDirtDifficulty unknownDevil's Thumb Trail
0.83 miDirtDifficulty unknownMarshall Valley Trail
0.82 miDirtDifficulty unknownBob and Betty Lakes Trail
0.82 miDirtDifficulty unknownMeadow Mountain Ranch Trail
0.82 miDifficulty unknownViewpoint Trail
0.82 miGroundDifficulty unknownSouth Saint Vrain Trail
0.82 miGroundMountain hikingCook Mountain Summit (unmaintained)
0.81 miGroundMountain hikingSugar Magnolia
0.81 miDirtDifficulty unknownFourmile Link Trail
0.80 miDirtDifficulty unknownIBM Connector Trail
0.80 miFine gravelDifficulty unknownRattlesnake Gulch
0.80 miDifficulty unknown1st/2nd Flatiron
0.80 miGroundDifficulty unknown
Official information
Parking, fees, permits, closures and rules are set by the managing agency and change often. We don't copy them here: check the official page before you go. Official page for Boulder County ↗ (link last checked 2026-10-17)
Source
© OpenStreetMap contributors (ODbL). Area boundary from OSM relation/1411337. Boundaries can be incomplete or out of date.