The Snahapish River is 10.7 miles (17.2 km) long.

[4] Its drainage basin is 20 square miles (52 km2) in area.

[5] The Snahapish River originates in the hilly lands on the west side of the Olympic Mountains on the Olympic Peninsula.

The river flows south through a broad valley.

It empties into the Clearwater River near Coppermine Bottom Campground.