Long Lake is located on the Pangman Tract (Concession 14, Lots 8-10; Concession 15, Lots 9-10 of South Frontenac Township, Frontenac County). Mean depth = 6.8 m; maximum depth = 26.0 m; surface area = 15.5 ha; shoreline = 2767.3 m. Long Lake has a single source of inflow on its east shore. There are no known outflows.