Formerly called Khao Salop National Park (อุทยานแห่งชาติเขาสลอบ), it was proclaimed a national park on 19 June 1975, with an area of 373,735 rai (597,976,000 square metres). Later, its name was changed to Erawan National Park as the highest level of the waterfall, Namtok Erawan, looks like Elephant Erawan's head.