13.9 km
~4 hrs 1 min
748 m
"An epic challenge to remember from the heart of Marin County"
The Cardiac Hill Loop is a 13.9 km looped trail that starts and ends in Mill Valley, Marin County, California. Based on our data, the trail 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 trail can be completed in approx 5 hrs 54 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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