The Redwood National and State Parks (RNSP) are a complex of one national park and three state parks, cooperatively managed, located in the United States along the coast of northern California. Comprising Redwood National Park (established 1968) and California's State Parks: Del Norte Coast, Jedediah Smith, and Prairie Creek (dating from the 1920s), the combined RNSP contain 139,000 acres (560 km2), and feature old-growth temperate rainforests. Located within Del Norte and Humboldt Counties, the four parks, together, protect 45 percent of all remaining coast redwood (Sequoia sempervirens) old-growth forests, totaling at least 38,982 acres (157.75 km2). These trees are the tallest, among the oldest, and one of the most massive tree species on Earth. In addition to the redwood forests, the p