This 1,414-acre area is in Clinton and Richland townships, Vinton County, approximately one mile north of Hamden. Lake Rupert lies along State Route 683 one-half mile north of the intersection with State Route 93.
The topography includes gently rolling, reverting old fields and woodland. The 973 acres of uplands surrounding the lake provide a variety of habitats for wildlife. Forty-five percent of the land is covered by woodland, 25 percent by brushland, and 30 percent by openland. The lake encompasses 325 acres, 25 percent of the total area. At conservation pool the lake is about two miles long with a maximum depth of 28 feet. Shoreline cover includes rooted aquatic vegetation, overhanging brush, felled shoreline trees, and submerged brushpiles.