The Sandia-Manzano Mountains are a substantial mountain area that defines the eastern edge of the middle Rio Grande valley of central New Mexico. They are not only an attractive backdrop to greater Albuquerque, the largest metropolitan area in New Mexico, but their elevation changes provide recreational opportunities including winter skiing and cool summer hiking or picnicing, as compared to the desert grasslands, foothills, and valley below. The entire mountain chain comprises three parts, arranged north to south: the Sandia Mountains, the Manzanita Mountains, and the Manzano Mountains. The Manzanita Mountains are a series of low-lying foothills that separate the Sandias from the Manzanos.