Landscapes & nature
Upper Klamath Lake
Lake in the United States
Wikipedia names Upper Klamath Lake as where 1 film or series was filmed; its page links to the sentence that says so. Wikidata records no shoot here yet.

Filmed here, per Wikipedia
Wikipedia says these were filmed in Upper Klamath Lake. Each title’s page links to the sentence that says so.
Green Dolphin StreetRomance film1947