A week before the Sombrero Ranches Great American Horse Drive begins, the Brown’s Park wranglers are out sweeping 50,000 acres of rolling hills and sagebrush in the northwest corner of Colorado for Sombrero horses that have wintered there. For days, they push the 500 horses into even smaller pastures until they finally reach an 8,000 acre pasture where the sorting pens are located. For a lot of people 8,000 acres would be considered a good sized ranch, but at Sombrero it is known simply as the “gather pasture.” “Most people don’t realize that Moffat County is almost bigger than some states. It’s a massive area, but only about 11,000 people live in Moffat County,” said Sombrero Ranches owner, Rex Walker. Sombrero Ranch is a family business started by Rex Walker and Pat Mantle in 1960. Pat Mantle is part of the pioneer Mantle Ranch in northwestern Colorado and the brother