Lake Quinault is a lake on the Olympic Peninsula in western Washington state. It is located in the glacial-carved Quinault Valley of the Quinault River, at the southern edge of Olympic National Park in the northwestern United States.
Lake Quinault is owned by the Quinault Indian Nation and is adjacent to the Quinault Rain Forest, a temperate rain forest. The area is accessible from U.S. Route 101.
Area activities include fishing (with permit from the Quinaults), scenic drives (there is a 30+ mile loop around the lake), and hiking. The southern side of the lake features a system of short hiking trails maintained by the National Forest Service that are accessible to casual day hikers.