Boulder County
County. Find your line here.
Trails736
Total length610 mi
Known loops19
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.
Wild Basin Trail + Copeland Falls side trail out and back from Wild Basin trailhead
1.32 miDifficulty unknownSugar Magnolia + Social 33 Rock Climb + Nw Haul Road Trails out and back
1.32 miDifficulty unknownHidden Star Trail
1.31 miDifficulty unknownMesa Trail + Enchanted Mesa Trail + Enchanted-Kohler Spur Trail + 3 more trails loop
1.31 miLoopDifficulty unknownTantra Park Path out and back
1.31 miDifficulty unknownNiwot Loop Trail + Cougar Trail loop
1.30 miLoopDifficulty unknownTodd Gulch out and back
1.30 miDifficulty unknownHomestead Trail
1.29 miGroundDifficulty unknownWalden Ponds + Sawhill Ponds + Birdsong Trail out and back
1.29 miDifficulty unknownSchoolhouse Loop + Schoolhouse Access out and back
1.28 miDifficulty unknownOutBack Loop - Private Trail
1.28 miDifficulty unknownRattelsnake XC
1.28 miDifficulty unknownOverbrook Trail
1.27 miFine gravelDifficulty unknownBoulder Reservoir Trail out and back from 55th St Trailhead
1.27 miDifficulty unknownRanger Trail
1.27 miGroundDifficulty unknownGoat Path Trail + North Goat Path Trail out and back
1.27 miDifficulty unknownFuzzy Spirit
1.27 miDirtDifficulty unknownDeer Ridge Trail
1.26 miDifficulty unknownSherwood
1.26 miHikingMiller Rock Descent + Miller Rock Shortcut out and back
1.26 miDifficulty 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 Boundaries can be incomplete or out of date.