The Sky Pilot

The Sky Pilot is a 1921 American silent drama film based on the novel of the same name by Ralph Connor. It is directed by King Vidor and features Colleen Moore.

This was the first film to be made in part at Vidors new studio. The snow scenes were shot in Truckee where the weather did not cooperate it snowed when the production needed sun, and was sunny when they needed a blizzard. When the snow would not let up, local townsfolk were hired to clear the snow manually for scenes that needed dry ground. Thereafter it stopped snowing salt was used to simulate snow on the ground. The stampede scene was shot in Fresno, California.

Source: Wikipedia