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15.6 km
~4 hrs 46 min
990 m
Out and Back
The Hallett Peak and Flattop Mountain via Bear Lake-Bierstadt Trail is a 15.6 km trail that starts in Estes Park, Larimer County, Colorado. Based on our data, the hike is graded as Difficult. 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 hike can be completed in approx 4 hrs 46 mins. Caution is advised on trail times as this depends on multiple variables. For more info read about how we calculate hike time.
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