The E Bar L Ranch, near Greenough, Montana, on the Blackfoot River ids one of the oldest family-owned and operated guest ranches in Montana. Summer 2025 will be its 100th season. Oral tradition says that Gertrude Landsburg “Mah” Potter was fed up with hosting husband Orrin William “Pops” Potter’s friends from Massachusetts Institute of Technology and The Great War, so much so that she demanded they help pay for food and service. A cook was hired, some horses rented, a couple cabins were thrown together and in 1925, the E Bar L Ranch became a promising guest ranch.