Where was The Beastmaster filmed?

1982 fantasy film directed by Don Coscarelli

The Beastmaster (1982) was filmed in Ventura County, Simi Valley, Valley of Fire State Park, Los Padres National Forest and Lake Piru, 5 places named in its Wikipedia article's Production section, in the United States. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.

See them on the map → Wikipedia Source data