Patuxent Research Refuge Patuxent Research RefugeStation reference point Central Tract Lottery Hunt Area (Open)1,445 acres Area Z (Special regs)60 acres Lake Allen (Special regs)20 acres Millrace (Special regs)382 acres North Tract (Special regs)7,854 acres Schafer Farm (Special regs)470 acres South Tract (Special regs)2,379 acres Closed (Closed)331 acres