Theodore Roosevelt National Park in western North Dakota covers 70,446 acres (110.072 sq mi; 28,508 ha; 285.08 km2) of land in three sections: the North Unit, the South Unit, and the Elkhorn Ranch Unit. Both main units of the park have scenic drives, approximately 100 miles of foot and horse trails, wildlife viewing, and opportunities for back country hiking and camping. The park is home to a wide variety of Great Plains wildlife including bison, coyotes, cougars, feral horses, badgers, elk, bighorn sheep, white-tailed deer and mule deer, prairie dogs, and at least 186 species of birds including golden eagles, sharp-tailed grouse, and wild turkeys. The brown, dormant grass dominates from late summer through the winter, but explodes into green color in the early summer along with hundreds of species of flowering plants. Winter can be a beautiful scene as snow covers the sharp terrain of the badlands and locks the park into what Theodore Roosevelt called “an abode of iron desolation.”