Where was The Mortal Storm filmed?

1940 film by Frank Borzage

The Mortal Storm (1940) was filmed in Salt Lake City and Sun Valley, 2 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