The Nature Conservancy, an international nonprofit conservation organization, owns a 103,000-acre ranch that includes a herd of roughly 2,500 bison in the 50,000-acre Medano Ranch section, in the southwest corner of the park. The conservancy offers a two-hour tour focused on the "Wild West" section of the park, where bison—along with coyotes, elk, deer, pronghorns, porcupines, and birds such as great horned owls and red-tailed hawks—roam in the grasslands and wetlands.
Depending on the season, the tour will be led as a hayride or a four-wheel-drive vehicle drive. On Tuesday, Friday, and Saturday, tours are $50 for adults 12 and older, $25 for children, and free for kids 5 and younger.
Tours begin at the Nature Conservancy's Zapata Ranch Headquarters, 5303 Hwy. 150, Mosca, Colorado, 81146, United States