Four Corners (disambiguation)
Four Corners is a region in the southwestern United States where the corners of Colorado, Utah, New Mexico and Arizona meet.
Four Corners Monument
In 1878, Rollin J. Reeves surveyed and marked the border between the newly created State of Colorado and the Utah Territory. Reeves located the sandstone shaft marker placed by Robbins at today's Four Corners Monument. He then began to survey and mark the border between Colorado and Utah from this point northward. In 1901, Howard B. Carpenter surveyed and marked the border between Arizona and Utah, completing the survey of borders making up the Four Corners Monument.