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11.4 km
~2 hrs 55 min
386 m
Out and Back
The Big Rock Ridge via Big Rock Trail is a 11.4 km trail that starts in Lucas Valley-Marinwood, Marin County, California. 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 2 hrs 56 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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