 The section of I-25 that is between the northern border of Pueblo County, Colorado, and the New Mexico state line is named the "John F. Kennedy Memorial Highway", in honor of President Kennedy's support of water resources development in the Arkansas River Valley.I-25 enters Wyoming south of the state capital city, Cheyenne.After traveling through Cheyenne, Interstate 25 continues north to Douglas, Wyoming, passing many plateaus and also railroad tracks.