At the southern terminus of Austin Road is one of 280 gems known as California State Parks.Caswell Memorial State Park is home to unique valley riparian woodlands. Such clustering of woodlands once covered immense swaths of the valley floor alongside rivers. Today less than 2 percent of riparian oaks that existed when unsuccessful gold seekers turned to farming still stand.The 258 acres in the state park are home to perhaps a hundred or so riparian brush rabbits.