 The Four Corners Monument marks the quadripoint in the Southwestern United States where the states of Arizona , Colorado , New Mexico , and Utah meet . It is the only point in the United States shared by four states , leading to this area 's being called the Four Corners region . The monument also marks the boundary between two semi @-@ autonomous Native American governments , the Navajo Nation , which maintains the monument as a tourist attraction , and the Ute Mountain Ute Tribe Reservation . 
