Solleks RiverThe Solleks River is a river in the U.S. state of Washington. It is a tributary of the Clearwater River, which in turn flows into the Queets River.The Solleks River is long. Its drainage basin is in area.CourseThe Solleks River originates in the Olympic Mountains on the Olympic Peninsula, about northeast of the mountain known as Kloochman Rock. It flows west to join the Clearwater River near Upper Clearwater Campground.