William H. Harsha Lake, formerly known as East Fork Lake, is a 2,160-acre impoundment located on the East Fork of the Little Miami River in Clermont County, Ohio. Created in 1978 for flood control, wildlife habitat preservation, and recreational purposes, the lake was renamed in 1981 to honor retired Congressman William H. Harsha. With a maximum depth of 113 feet at the dam, it ranks as Ohio's second deepest lake. The lake features a 32.3-mile shoreline that is predominantly steep and rocky, falling off rapidly into deep water. William H. Harsha Lake is managed by the Ohio Department of Natural Resources and the U.S. Army Corps of Engineers, and is surrounded by East Fork State Park, one of Ohio's largest state parks, offering extensive recreational opportunities beyond fishing.