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. One of the most dominant features of Lake Quinault is its location within the Quinault Rain Forest, a temperate rain forest.
Lake Quinault is owned by the Quinault Indian Nation. The area is accessible from U.S. Route 101.