The Calawah River is a 31 mi (50 km)[2] tributary of the Bogachiel River in Clallam County in the U.S. state of Washington, on its Olympic Peninsula.[3] Its two major tributaries are the South and North Forks Calawah River.[4] The river drains an unpopulated portion of the low foothills of the Olympic Mountains; its entire watershed consists of virgin forest.[5] The river drains 129 square miles (330 km2) above U.S. Highway 101, which crosses the river about 6.6 miles (10.6 km) upstream of its mouth.[6]
The river's name comes from the Quileute word qàló?wa:, meaning "in between",[7] or "middle river".[8]