Cathedral Cliff is a 5,810-foot (1,770 meter) elevation volcanic plug located on Navajo Nation land in San Juan County of northwest New Mexico, United States. It is a prominent landmark set alongside U.S. Route 491, approximately 13 miles south of the community of Shiprock, New Mexico. Cathedral Cliff is one of the phreatomagmatic diatremes of the Four Corners area, and with significant relief as it rises 400 feet (122 meters) above the high-desert plain. It is situated about 9.5 miles (15.3 km) southeast of Shiprock, the most famous of these diatremes. Cathedral Cliff is set in the northeastern part of the , a volcanic field that includes intrusions and flows of minette and other unusual igneous rocks which formed around 30 million years ago during the Oligocene. Its nearest higher neighb