 The terrain slopes to the several river valleys; the NW corner lies at 1,329' (405m) ASL, and a small hill 0.2 mile (0.35 km) west of Rogers Lake rises to 1,450' (442m) ASL.The county has a total area of , of which is land and (1.6%) is water.Under a 1854 Treaty of La Pointe the Fond du Lac Indian Reservation and other reservations were established in exchange of all of the Lake Superior Ojibwe lands in the Arrowhead Region.