Northwest Montana Wetland Management District-Lake County Northwest Montana Wetland Management District-Lake CountyStation reference point WPA Open (Special regs)3,557 acres Anderson WPA163 acres Crow WPA1,533 acres Cruz WPA322 acres Duck Haven WPA821 acres Herak WPA84 acres Johnson WPA70 acres Kickinghorse WPA174 acres Montgomery WPA84 acres Sandsmark WPA419 acres