Where was The Triumphs of a Man Called Horse filmed?
1983 film by John Hough
The Triumphs of a Man Called Horse (1983) was filmed in Red Lodge, 1 place 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.
Places per Wikipedia's Production section
Wikipedia’s Production section names 1 place. Each links to the sentence that says so.
Recorded only at country level
Its Wikipedia article also says it was filmed in Mexico, Spain, without naming a place, so it is not on the map.