Gene Coulon Memorial Beach Park is a public park located in Renton, Washington along the southeastern shore of Lake Washington. It consists of 57 acres of land and water, including 5 acres of grass and 5,400 feet of shoreline. Its amenities include a swimming beach, an eight-lane boat launch, two restaurants, a 900-foot pier/water walk, two miles of path…Gene Coulon Memorial Beach Park is a public park located in Renton, Washington along the southeastern shore of Lake Washington. It consists of 57 acres of land and water, including 5 acres of grass and 5,400 feet of shoreline. Its amenities include a swimming beach, an eight-lane boat launch, two restaurants, a 900-foot pier/water walk, two miles of paths and trails, a newly renovated park, and tennis courts.