Four Corners Monument

Four Corners Monument

Four Corners Monument, after its 2010 reconstruction
36°59′56″N 109°02′43″W / 36.99898°N 109.04517°W / 36.99898; -109.04517 (Four Corners Monument)[1]
Location	The quadripoint in the Southwestern United States where the states of Arizona, Colorado, New Mexico, and Utah meet
Designer	Navajo Nation Bureau of Land Management
Type	Megalithic
Material	Granite and brass
Beginning date	1868
Completion date	1912
Opening date	1931
Website	Official website
"Here meet in freedom under God four states"

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 the area being named the Four Corners region.^[2] 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.

The origins of the state boundaries marked by the monument occurred just prior to, and during, the American Civil War, when the United States Congress acted to form governments in the area to combat the spread of slavery to the region. When the early territories were formed, their boundaries were designated along meridian and parallel lines. Beginning in the 1860s, these lines were surveyed and marked. These early surveys included some errors, but even so, the markers placed became the legal boundaries, superseding the written descriptions of geographical meridians and parallels. This includes the Four Corners Monument, which has been legally established as the corner of the four states.