El Morro National Monument is a U.S. national monument in Cibola County, New Mexico, United States. Located on an ancient east–west trail in the western part of the state, the monument preserves the remains of a large prehistoric pueblo atop a great sandstone promontory with a pool of water at its base, which subsequently became a landmark where over the centuries explorers and travelers have left personal inscriptions that survive today.

Cibola County is a county in the U.S. state of New Mexico. As of the 2020 census, the population was 27,172. Its county seat is Grants. It is New Mexico's youngest county, and the third youngest county in the United States, created on June 19, 1981, from the westernmost four-fifths of the formerly much larger Valencia County.