Saguaro Lake was formed by the Stewart Mountain Dam, which was completed in 1930. It was the last of the reservoirs to be built on the Salt River.
The lake is named for the Saguaro Cactus, which stand majestically in the surrounding desert landscape. Saguaro Lake has more than 22 miles of shoreline, creating a great environment for boating, kayaking, sailing, skiing, jet skiing, fishing and camping.