Boulder - Grand Pass and Thunder Lake Trail trail stages

stage 1

Boulder - Grand Pass and Thunder Lake Trail stage 1 Map

Starting at: Allenspark, Boulder County, 80510

Ending at: Allenspark, Boulder County, 80510

Distance: 10.4 km

Elevation gain: 799 m

Duration: 03:24:12

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stage 2

Boulder - Grand Pass and Thunder Lake Trail stage 2 Map

Starting at: Allenspark, Boulder County, 80510

Ending at: Wild Basin trailhead, Allenspark, Boulder County, 80510

Distance: 12.9 km

Elevation gain: 478 m

Duration: 03:22:49

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