Cedar River Boathouse boat ramp provides non-motorized access to Lake Washington at the mouth of the Cedar River in Renton, with free parking and nearby amenities including picnic areas, playgrounds, and restrooms.

The ramp is located within a scenic 24-acre park that offers views of Lake Washington and serves as a gateway to paddling on the lake's south end, where paddlers should be aware of semi-submerged trees and logs.

Kayak and canoe rentals and instruction are available at the adjacent Cedar River Boathouse.