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,[6] 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[7] which sits 4200 ft (1280 m) above the park.

[2] A jeweler and miner from Wilbur named the lake in 1900 after his daughter, Alta Heinz.

[2] The park offers swimming, boating, fishing and sailboarding on Alta Lake, which measures about 2 miles (3.2 km) long and .5 miles (0.80 km) wide.

[10] The park has camping and picnicking facilities and 2 miles (3.2 km) of hiking trails.