Street in America. (It's in Gardiner, Montana)

Take away the vehicles and I can imagine Gary Cooper or John Wayne riding into town along this road.

 

My father took this photo when he and Mum toured America from coast to coast in the 1970s. Can anyone help with the location?

 

(It is Gardiner, Montana on the edge of Yellowstone. See comment from Fraser Pettigrew below)

Done