Rainbow Falls State Park in WA -- Campground & RV Camping in Washington
Rainbow Falls State Park in WA
WA State Parks allows overnight stays only at the designated sites here.
129-acre park on the Chehalis River showcasing a 5-foot waterfall cascading over 17-million-year-old basalt and surrounded by old-growth forest with trees up to 200 feet tall. Offers 10 miles of hiking trails, camping, fishing, swimming, and a spur connecting to the 56-mile Willapa Hills Trail through stands of Douglas fir and western red cedar.
Grounded in en.wikipedia.org · read August 24, 2026The road in has not been measured -- unknown, not bad. Sits on broad, near-level ground.
Crowded here -- the nearest through road is 0.1 miles off, a 52-site campground. Marcuson Creek runs 0.1 mi off. Night skies measure Bortle 2 -- true dark-sky territory. Bucks Knob stands 2,122 ft above the site, 5.9 miles northwest. The nearest town, Chehalis, is 13 mi off.
September normals 48–74°F, 2.0″ rain. Monthly averages, PRISM 1991–2020.