Turnbull National Wildlife Refuge Turnbull National Wildlife RefugeStation reference point Southwest (Open)3,978 acres Helm's (Special regs)330 acres Long Lake (Special regs)1,893 acres Northeast (Special regs)1,365 acres Northwest (Special regs)857 acres Upper Turnbull Slough (Special regs)231 acres Closed Area (Closed)9,319 acres Public Use Area (Closed)3,249 acres