Kenneth Hahn State Recreation Area, or Kenneth Hahn Park, is a state park unit of California in the Baldwin Hills Mountains of Los Angeles. The park is managed by the Los Angeles County Department of Parks and Recreation. As one of the largest urban parks and regional open spaces in the Greater Los Angeles Area, many have called it "L.A.'s Central Pa…Kenneth Hahn State Recreation Area, or Kenneth Hahn Park, is a state park unit of California in the Baldwin Hills Mountains of Los Angeles. The park is managed by the Los Angeles County Department of Parks and Recreation. As one of the largest urban parks and regional open spaces in the Greater Los Angeles Area, many have called it "L.A.'s Central Park". The 401-acre park was established in 1984. The land was previously the Baldwin Hills Reservoir, which failed catastrophically in the 1963 Baldwin Hills Dam disaster.