Higgins Lake is a large recreational and fishing lake in Roscommon County, in the U.S. state of Michigan. The 9,900 acre (40 km²) lake is known for its deep, clear waters and is the 10th largest in Michigan with a shoreline of 21 miles (34 km). It is named after Sylvester Higgins, the first chief of the topographical department of the Michigan Geological Survey. It has a maximum width of 4 miles (6.4 km) and a length of 7 miles (11 km) with a maximum depth of 135 feet (41 m). The mean depth is 44 feet (13 m) and the lake contains almost 20 billion cubic feet (570 million m³) of water. Its retention time is about 12.5 years. The lake's watershed covers 19,000 acres (77 km²). The twin-lobed lake receives half of its water from submerged springs, six percent from incoming streams, and the rem