The Refuge has two permanent lakes, Lake Tewaukon and Sprague Lake. Both of these lakes are open to fishing. Anglers can catch northern pike, walleye, perch, and bullheads on Lake Tewaukon and Sprague Lake. The remainder of the Refuge’s wetlands are managed for migratory birds and are closed to fishing. They are also periodically drawn down and allowed to dry out in the summer months.