Silverado is an unincorporated community in Silverado Canyon, which is located in the Santa Ana Mountains in eastern Orange County, California. Portions of the town sit on a former Mexican land grant Rancho Lomas de Santiago. Silverado is located at the boundaries of Cleveland National Forest. The site is a California Historical Landmark, and is located ne…Silverado is an unincorporated community in Silverado Canyon, which is located in the Santa Ana Mountains in eastern Orange County, California. Portions of the town sit on a former Mexican land grant Rancho Lomas de Santiago. Silverado is located at the boundaries of Cleveland National Forest. The site is a California Historical Landmark, and is located near the village site of Puhú.