Once the headquarters of a 10,000,000 acre, open-range, cattle empire, what today is Grant-Kohrs Ranch symbolizes the importance of cattle ranching in Montana, and the American west. The vast, unfenced grasslands served as rich feeding grounds for the large herds that promised riches for the ranchers flocking to the area. A “gold rush” to ranching, however, inevitably brought problems. Overgrazing, harsh weather, and the introduction of barbed-wire fencing brought the open range ranch in era to a close after only three decades.