Barnabe Mountain via Bill's Loop Trail

The Barnabe Mountain via Bill's Loop Trail is a 9.7 km looped trail that starts and ends in Lagunitas-Forest Knolls, 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 39 mins. Caution is advised on trail times as this depends on multiple variables. For more info read about how we calculate hike time.