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10.3 km
~2 hrs 59 min
554 m
Loop
The Old Black Rock Lake via Pettijohn Trail is a 10.3 km looped trail that starts and ends in Mad River, Trinity 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 59 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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