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Tri-State Corner of the States of
Wyoming, Utah & Colorado
South of I-80 Exit 99 on U.S. Highway 191 for 31 miles. Turn east on dirt road.
After 11 miles, directional signs lead you through the last 10 miles to monument.
This point was monumented by U.S. surveyor, Rollin J. Reeves, on July 19, 1879, while completing the survey of the western boundary of the State of Colorado and the east boundary of Utah Territory. The boundary line separating Wyoming Territory from Colorado and Utah Territories was surveyed by U.S. surveyor, A.V. Richards in 1873.

The original monument was found to be disturbed in 1931 and was remarked by U.S. Cadastral Engineer, E.V. Kimmel, with a brass tablet seated in a concrete monument.

This monument is one of the corners of the national Rectangular Cadastral Survey System, inaugurated in 1785, that has aided the development and orderly settlement of the public lands in the western states. From these monuments, state and local governments and private citizens are provided with easily identifiable boundaries. Such monuments serve as a base for the work of private surveyors in making accurate land subdivisions and descriptions.
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