- Rainbow Falls State Park covers 850 acres and 3,400 feet of freshwater shoreline on the Chehalis River. A falls, above a bridge, creates a rainbow which gave the park its name and the area around the park is abundant with bear, elk, deer and grouse. The park facilities include 47 campsites, three primitive sites, 65 picnic sites, two kitchen shelters, play equipment, a group camping area for 17 camping units and a kitchen shelter, a trailer dump, a ball field, a play area, a vehicle and a pedestrian bridge across the Chehalis River, and 62.85 miles of trail.
Recreation - Activities at the park include camping, fishing, hiking, picnicking, kayaking, and play field games.
Climate - Washington's climate varies with each region. The Cascades split the state and alter weather patterns. Western Washington is temperate, due to the coastal geography. The water is a stabilizing force for the climate, making extreme temperatures rare. The area receives large amounts of rainfall from Pacific storms and some snow during winter months.
Rainbow Falls State Park, in south coastal Washington, is located in Lewis County, 18 miles west of Chehalis and eight miles east of Pe Ell on State Highway 6.