Lake Elsinore, originally Laguna Grande, is the largest natural freshwater lake in Southern California and is situated at the lowest point within the San Jacinto River watershed at the terminus of the San Jacinto River, where its headwaters are found on the western slopes of San Jacinto Peak with its North Fork, and Lake Hemet with its South Fork. Lake levels are healthy at above sea level with a volume of that often fluctuate, although much has been done recently to prevent the lake from drying up, flooding, or becoming stagnant. At , the lake would spill into the outflow channel on its northeastern shore, known properly as Temescal Wash, flowing northwest along I-15, which feeds Temescal Creek, which dumps into the Santa Ana River just northwest of the City of Corona. It then flows to Orange County, out to the Pacific Ocean just south of Huntington State Beach.