Lake Oroville State Recreation Area (LOSRA) is a state park unit of California, United States, surrounding Lake Oroville, a reservoir on the Feather River. It is located in Butte County outside Oroville, California. The park was established in 1967. The recreation area "includes Lake Oroville and the surrounding lands and facilities within the project area as well as the land and waters in and around the Diversion Pool and Thermalito Forebay, downstream of Oroville Dam."