Rainbow Falls State Park

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A rare cluster of old-growth trees creates an inspiring shadow to stand in. Rainbow Falls State Park, 16 miles west of Chehalis, is a walker’s paradise. Miles of loamy trails wind through the forest and along the river, to a small cascade that throws rainbows of spray at the sun.

Tree lovers, maybe you’d rather see towering Douglas-fir, western hemlock and western red cedar trees from your bike or the back of your steed. Many of the park trails are mixed-use, and if you need more, take to the nearby Willapa Hills State Park Trail, a rails-to-trails fixture that goes over trestles and bridges, through forest, farmland and tiny towns.

Rainbow Falls is the obvious overnight stop for hikers, cyclists and horseback riders tackling the developed 22 miles of Willapa Hills Trail from Chehalis to Pe El. Such explorers may stay at hiker/biker campsites, or camp with their horses in one of two equestrian sites.

Built by the Civilian Conservation Corps in 1935, Rainbow Falls showcases several structures designed in the rustic style of the National Park Service during the Great Depression, including kitchen shelters and comfort stations still in use today.

Park features

Rainbow Falls State Park is a 129-acre camping park with 3,400 feet of freshwater shoreline on the main stem of the Chehalis River. 

Discover Pass: A Discover Pass is required for vehicle access to state parks for day use. For more information about the Discover Pass and exemptions, please visit the Discover Pass web page.

  1. Activities
  2. Camping
  3. History
  4. Maps

Picnic & day-use facilities

The park provides one reservable kitchen shelter with water, electricity, and 10 picnic tables. There are 20 additional day-use picnic tables, available first come, first served. To reserve the kitchen shelter, reservations can be made year round online or by calling 1-888-226-7688. A Discover Pass is required for access to all day-use facilities.



  • 3 miles of hiking trails
  • Spur trail to the Willapa Hills Trail

Water activities & features

  • Fishing (freshwater)
  • Swimming - Chehalis River
    (no designated swim area; no lifeguards)

Other activities

  • Bird watching
  • Horseshoe pits (2)
  • Interpretive activities
  • Softball field
  • Wildlife viewing

Additional information