These are recently released photographs of Marilyn Monroe during the filming of River of No Return 1954.

The cast and crew on this film had left Hollywood  for Calgary in late June 1953. From there they travelled by special train to the Banff Springs Hotel, which would serve as their base during the Canadian filming.  The 1954 film features the landscape of Jasper National Park and Banff National Park with quite a bit of location and studio filming.