Global Range: (>2,500,000 square km (greater than 1,000,000 square miles)) The huge range extends from Montana, South Dakota, southern Minnesota, Michigan, southern Ontario, southern Quebec, and southern Maine southward through western eastern, and southern Mexico and Central America to northwestern South America (Eciador, northwestern Colombia, and northern Venezuela) (Williams 1994), at elevations from near sea level to around 2,740 meters (9,000 feet) (Stebbins 2003). In the United States, this snake ranges west to Utah and Arizona, east to the Atlantic coast, and south to the Gulf Coast and southern Florida.