River of No Return is a 1954 Western film that stars Robert Mitchum and Marilyn Monroe in lead roles. The story follows Matt Calder (Mitchum), a widowed farmer who is on his way to settle down in a new town with his son Mark (Tommy Rettig). On their journey, they meet a saloon singer named Kay Weston (Monroe), who is trying to locate her estranged husband Harry (Rory Calhoun).
Calder and Weston soon find themselves battling the rapids of the Salmon River on a raft, trying to avoid the dangerous terrain and hostile Native American tribes. Along the way, they encounter several obstacles, including a greedy businessman who is after Weston's precious cargo and a group of thieves who try to rob them.
As Calder and Weston navigate through the treacherous river, they develop a close bond and start to fall in love. However, their quest to find Harry becomes increasingly difficult as they face challenges at every turn. In the end, they must decide whether to continue their search or stay together and start a new life.
The film is known for its stunning location shots in British Columbia, Canada, and its memorable theme song sung by Monroe. It is also notable for being one of Monroe's first major film roles and for showcasing her abilities as a dramatic actress. Overall, River of No Return is a classic Western adventure that has stood the test of time.