Where was The Runner Stumbles filmed?
1979 film by Stanley Kramer
The Runner Stumbles (1979) was filmed in Ellensburg and Roslyn, 2 places named in its Wikipedia article's Filming locations 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 Filming locations section
Wikipedia’s Filming locations section names 2 places. Each links to the sentence that says so.

