The Caprock Escarpment is a term used in West Texas and Eastern New Mexico to describe the geographical transition point between the level high plains of the Llano Estacado and the surrounding rolling terrain. In Texas, the escarpment stretches around south-southwest from the northeast corner of the Texas Panhandle near the Oklahoma border. The escarpment is especially notable, from north to south, in Briscoe, Floyd, Motley, Crosby, Dickens, Garza, and Borden counties. In New Mexico, there is a prominent escarpment along the northernmost extension of the Llano Estacado, especially to the south of San Jon and Tucumcari, both in Quay County, New Mexico. Along the western edge of the Llano Estacado, the portion of the escarpment that stretches from Caprock to Maljamar, New Mexico is called the Mescalero Escarpment or Mescalero Ridge.