Redwood Sunbeams, California, Del Norte Redwoods. Del Norte Coast Redwoods State Park is a state park of California, USA, and a component of the Redwood National and State Parks. The property is about half old-growth forest of coast redwoods and includes 8 miles (13 km) of wild Pacific coastline.[1] The park was significantly expanded in 2002 with the 25,000-acre (10,000 ha) Mill Creek Addition.[2] Originally established in 1925, the park is now 31,261 acres (12,651 ha)