The Burro Flats site is a painted cave site located near Burro Flats, in the Simi Hills of eastern Ventura County, California, United States. The Chumash-style "main panel" and the surrounding 25-acres were listed on the National Register of Historic Places in 1976, with a boundary decrease in 2020. The main panel includes dozens of pictographs in a variety of colors. The cave is in the mountains, near the bi-lingual Chumash/Fernandeno village of Huwam/Jucjauynga. The Burro Flats painted cave and the rest of the former Santa Susana Field Laboratory are not accessible to the public.