KRTH (101.1 FM, "K-Earth 101") is a U.S. oldies radio station located in Los Angeles, California, broadcasting to the Greater Los Angeles Area. Its signal covers an extremely large area, due in part to height upon Mt. Wilson, and sometimes can be heard as far south as San Diego and Tijuana, as far east as Moreno Valley, as far west as Santa Barbara and as far north as Baker, California.