Vaughn is a census-designated place (CDP) in Cascade County, Montana, United States.

In the fall of 1869, he traveled into Chouteau County, Montana, which at the time covered nearly a sixth of the state.

[6] Devastated by her death, Vaughn determined to sell his ranch and move into nearby Great Falls.

Vaughn sold his ranch in 1890 to "Captain" Thomas Couch, a Cornish immigrant and expert miner who managed the Boston and Montana Consolidated Copper and Silver Mining Company in Great Falls.

[5] In 1890, the North Western Coal and Navigation Company constructed the Great Falls & Canada Railway, a narrow-gauge railway (3-foot (0.91 m)) which ran from Sweet Grass, Montana (at the Canada–US border) to a terminus adjacent to the Robert Vaughn Ranch.

[7] Designed to carry coal to Lethbridge, Alberta, the railroad was dubbed the "Turkey Trail".

[8] According to the United States Census Bureau, the CDP has a total area of 3.5 square miles (9.1 km2), all land.