The river originates at a ridge between it and Silesia Creek.

It flows just over 7 miles northeast from there to its confluence with the Chilliwack on the opposite side of the river from a trail leading up the Chilliwack.

The Little Fork Little Chilliwack River starts at the base of Copper Mountain.

It flows about 4 ½ km northeast as well, merging with the main fork about 2 km upstream from the river's mouth.

This article related to a river in the state of Washington is a stub.