Oregon Movies: Rachel and the Stranger
Filmed in Eugene in 1948.
About this movie (by Rovi)
"This late-40s western features Robert Mitchum as an Indian scout who happens upon an unlikely family cabined up in the Great Northwest. They're unlikely because the widower settler (William Holden) has 'purchased' a wife (Loretta Young as wife Rachel) to help raise his son and do the female chores around the farm.
The son resents the surrogate mom and the whole bunch aren't too happy when Mitchum shows up and starts making eyes at the lady. Their mutual attraction makes Holden jealous and he starts finding his wife a lot more attractive. It takes a full-fledged Indian attack to force the action, resolving the issue as to who's the right fella for Rachel."