Austin Creek State Recreation Area is a state park unit of California, USA, encompassing an isolated wilderness area. It is located in Sonoma County, California, adjacent to Armstrong Redwoods State Natural Reserve, with which it shares a common entrance. Its rugged topography includes ravines, grassy hillsides, oak-capped knolls, and rocky summits offering glimpses of the Pacific Ocean. There are 20 miles (30 km) of trails, panoramic wilderness views, and camping (both back-country and vehicle-accessible).