Two Rivers National Wildlife Refuge Two Rivers National Wildlife RefugeStation reference point Apple Creek (Special regs)298 acres Batchtown (Special regs)2,463 acres Calhoun Wetlands (Special regs)747 acres Clarksville Island (Special regs)782 acres Gilbert Lake (Special regs)688 acres Pohlman Forest (Special regs)96 acres Portage Island (Special regs)143 acres Swan Lake Wetlands (Special regs)3,791 acres