Forester Creek, an 11-mile-long tributary of the San Diego River leading to the Pacific Ocean, was once a major natural feature in El Cajon. But the creek and its three tributaries that flow through the city and into Santee via cement channels is in need of some TLC. Much of the creek is fenced off, hidden behind businesses and residential areas. The waterway is polluted with trash and is considered to have the lowest water quality of any of the river’s tributaries, according to The San Diego River Park Foundation.