Alta Lake State Park is a public recreation area located two miles (3.2 km) southwest of Pateros, Washington, at the northern end of 220-acre (89 ha) Alta Lake, in the mountainous northwest interior of the state. The 181-acre (73 ha) state park and adjacent lake lie beneath towering stone cliffs, formed by glaciation, that rise 1000 feet (304 m) above the valley floor, and carry on up to the top of Old Goat Mountain which sits 4200 ft (1280 m) above the park. A two-mile-long (3 km) road leading to the park, Alta Lake Road, intersects State Route 153, which runs along the Methow River. The park is managed by the Washington State Parks and Recreation Commission.