San Gabriel Valley
The Greater San Gabriel Valley is served, between the 14 and 15 Freeways – east/west, and the San Gabriel Mountains to the Puente Hills – north/south. The SGMRC watershed study/plan ("Reconnecting the San Gabriel Valley") covered of the Upper San Gabriel River and its tributaries, the largest single watershed study in Los Angeles County. The Greater San Gabriel Valley includes almost a third of the population of Los Angeles County.