Lake Washington-Cedar River is a significant waterway located in the state of Washington. The lake is the largest in King County and serves as a vital resource for recreation, wildlife habitat, and water supply. It is bordered by several cities, including Seattle and Bellevue, and is known for its scenic beauty and recreational opportunities such as boating, fishing, and swimming. The Cedar River flows into Lake Washington and is an important tributary that provides water to the lake. It originates in the Cascade Mountains and travels through Cedar River Watershed, which is a protected area that supplies drinking water to the region. The river is also popular for hiking, fishing, and enjoying nature.