Patagonia Lake State Park is a state park of Arizona, USA, containing Patagonia Lake. The 2.5-mile-long (4.0 km), 250-acre (100 ha) lake located near Patagonia, Arizona, is a popular southern Arizona site for fishing, camping, boat rental, picnicking, hiking, and birding. Located inside the park is the recently established Sonoita Creek State Natural Area, Arizona's first major state natural area. Created by the damming of Sonoita Creek, the lake is habitat for bass, crappie, bluegill, and catfish, and is stocked with rainbow trout during the winter. Special events include an annual mariachi festival in March and bird tours and interpretive programs on request.
Patagonia Lake State Park is located on State Route 82, 7 miles (11 km) south of Patagonia, Arizona.