Purpose of the Roundup
Photo: South Dakota Buffalo Roundup(Photo by Lauren Breedlove)
The Roundup isn't just a fun tradition, it's also a necessary process to manage the herd size and health. Approximately 1,300 wild bison are driven across the prairie, down through the valley and into the corrals where they will be vaccinated, sorted, the calves branded, and a pregnancy check conducted for the females. About 200 of the bison are selected to be sold in auction in November and ten males are placed back into the park for reproduction.