About San Marcos :

San Marcos is best known as being the home of Cal State University, San Marcos. It’s in the northern portion of San Diego County and as of 2009, has a population of 82,743. The original town of San Marcos was at the intersection of what are now Grand Avenue and Rancho Santa Fe Road. In 1887 the Santa Fe Railroad announced that it was going to lay tracks going through the valley, but to the disappointment of the citizens, the tracks were laid one mile away from the center of the town. In the 1970s, San Marcos was flourishing as the third fastest-growing city in the state with a population of 17,479 by 1980. The population continued to boom over the next two decades, reaching 33,800 in 1990 and 82,743 in 2000.