4.0 star · Medium Out and Back

Green Reservoir via Buchanan Pass Trail

Arapaho and Roosevelt National Forests · Boulder County, Colorado

Trail length

21.9 km

Time

~1 day 0 hrs

Elevation Gain

568 m

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"A wonderous hike from the heart of Boulder County"

The Green Reservoir via Buchanan Pass Trail is a 21.9 km looped trail that starts and ends in Allenspark, Boulder County, Colorado. Based on our data, the trail is graded as Medium. For information on how we grade trails, please read measuring the difficulty of a hiking trail on hiiker. Also, check our latest community posts for trail updates.

This trail can be completed in approx 2 days. Caution is advised on trail times as this depends on multiple variables. For more info read about how we calculate hike time.