<P> The Great Plains ( sometimes simply `` the Plains '' ) is the broad expanse of flat land ( a plain ) , much of it covered in prairie , steppe , and grassland , that lies west of the Mississippi River tallgrass prairie states and east of the Rocky Mountains in the United States and Canada . It embraces </P>
where are the great plains located in the united states
west of the Mississippi River tallgrass prairie states and east of the Rocky Mountains