North Fork is home to one of the only natural lakes in the San Gabriel Mountains, Crystal Lake. It is also the steepest of the 3 major forks feeding the San Gabriel River. Continue up hwy 39 past the east fork bridge, San Gabriel OHV area and the west fork / Cogswell damn parking lot to enter North Fork.
Filmed in the lower section of north fork, this area contains picnic tables and plenty of pools to cool off in on a hot summer day, try your luck fishing or just relax next to the well shaded stream.