Monroe Lake is a reservoir located about 10 miles (16 km) southeast of Bloomington, Indiana, United States. The lake is the largest entirely situated in Indiana with 10,750 acres (43.5 km²) of water surface area spread over the counties of Monroe and Brown. Capacity varies from 292 gigalitres (237,000 acre⋅ft) to 428 gigalitres (347,000 acre⋅ft) depending on water level. It is also home to 13,202 acres (53.43 km²) of protected forest and three recreational areas. Indiana's only federally protected U.S. Wilderness Area, the 13,000-acre (53 km²) Charles C. Deam Wilderness Area, is located on the south shore. The pool elevation is about 538 ft year-round. During colder winters, limited ice fishing is available on protected backwater portions of the reservoir.