Which factor contributed to the end of the open range in the American west?

The end of the open range in the American West was primarily due to the introduction of barbed wire, which allowed ranchers to enclose their lands and manage cattle more effectively. This Fencing limited the open grazing areas that had previously allowed cattle to roam freely. Additionally, factors such as overgrazing, drought, and the expansion of agriculture further diminished the viability of open-range cattle ranching. Together, these elements transformed the landscape of ranching and led to the establishment of more structured land ownership and use.