State parks in Washington include Lewis & Clark, Iron Horse, Potholes, Sacajawea and South Whidbey. Lewis & Clark, which was named after the famous explorers, is 621 acres and contains one of the last stands of old-growth forest. Abundant in streams, wetlands and conifers, including Douglas fir and red cedar, this park opened in 1922 as a campsite for automobile tourists. Many of its buildings were constructed by the Civilian Conservation Corps during the Great Depression.
Sacajawea State Park was named after the Native American woman who helped Lewis and Clark on their journey. This 284-acre park is found at the confluence of the Columbia and Snake Rivers and was in fact built on the site of one of the Lewis and Clark expedition campsites.
Potholes is a 640-acre park located on the shores of Potholes Reservoir, also called O'Sullivan Reservoir. This location gives the park 6,000 feet of shoreline. It is a camping park, and there are fees to stay there. Potholes is unusual in that it is a freshwater marsh desert.
South Whidbey State Park is noted for its old growth forest, with towering old cedars, Douglas fir trees and Sitka spruce. This park is found on Whidbey Island.