 45º31'30.0"N, 102º28'11.9"W. 111 miles from the nearest McDonald's.  Two men remove their hats stand for the national anthem before the start of the Perkins County Rodeo in Bison, SD. In Perkins County, 23.8% of the population is over 65, significantly above the US average of 15.2%, and only 21% is under 18. It's sign of an aging population in rural communities with fewer young families staying here to replenish the population, seeking an easier way of life. 