What is the largest ranch in Montana? Possibly the Yellowstone Club in Big Sky Montana owned by Tim Bixseth at 213,895 acres although it is best known as a private Golf and Sking resort. Ted Turner who founded CNNâ¦ is the owner of the largest amount of land in the US at over two million acres and much of that property is in Montana. Turner Ranches own four different Montana Ranches and includes 40,000 Bison in its holdings.