Where was Sometimes a Great Notion filmed?

1971 film by Paul Newman

Sometimes a Great Notion (1971) was filmed in Newport, Lincoln County, Columbia River Gorge, Oregon Coast, Siletz River, Yaquina River and 1 more place, 7 places named in its Wikipedia article, 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