Boulder County

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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.

• Spring Brook Loop North Trail

  2.19 miDirtDifficulty unknown

• Button Rock Mountain Loop

  2.18 miLoopGroundDifficulty unknown

• Plants and Animals

  2.18 miDirtDifficulty unknown

• Doudy Draw Trail

  2.18 miDirtDifficulty unknown

• Niwot Loop Trail

  2.17 miFine gravelDifficulty unknown

• FlatIrons Vista South Trail

  2.17 miGroundDifficulty unknown

• Coney Lake Trail

  2.15 miGroundMountain hiking

• Mount Audubon Trail

  2.13 miGroundDifficulty unknown

• Lion Lake Trail

  2.10 miGroundDifficulty unknown

• North Sheep Mountain Trail

  2.08 miDifficulty unknown

• Wapiti Trail

  2.08 miDirtDifficulty unknown

• Cony Lake Trail

  2.07 miGroundMountain hiking

• Managers

  2.04 miDirtDifficulty unknown

• Switzerland Trail Colo. & North Western R. R.

  2.01 miHiking

• South Saint Vrain Trail

  2.00 miDirtDifficulty unknown

• South Saint Vrain

  1.93 miDirtDifficulty unknown

• Ouzel Lake Trail

  1.91 miUnpavedDifficulty unknown

• Green Mountain West Ridge Trail

  1.90 miGroundDifficulty unknown

• Ceran St. Vrain Trail

  1.88 miDifficulty unknown

• Shanahan - South Fork Trail

  1.82 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 Boundaries can be incomplete or out of date.