Early Los Altos and Los Altos Hills - Hardcoverby Don McDonald (Author), Los Altos History Museum (Author) Los Altos would never have existed if not for the Southern Pacific Railroad. Since the 1850s, Los Altos, Spanish for "heights" or "foothills," was the name generally applied to the two ranchos (San Antonio and La Purisima Concepcion) between Palo Alto and Mountain View southwest of El Camino Real. In 1906, visionaries Paul Shoup, who worked for the railroad, and Walter Clark, a Mountain View