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15.1 km
~4 hrs 3 min
617 m
Out and Back
The Tunnel Lake via CDT is a 15.1 km trail that starts in Nathrop, Chaffee County, Colorado. Based on our data, the hike 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 hike can be completed in approx 4 hrs 3 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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