How far must we go to get away from it all?

A traveler lamenting another strip mall in the wilderness set out to determine where in American are you farthest from a McDonalds. If Alaska were included in his analysis the answer would be easy. So let's stick to the lower 48. Start with a map showing all 13,000 McDonald's Gilded Parabolas. Then look for blank spots -- central Nevada, arid hills of southeastern Oregon, Salmon River Mountains of Idaho, and the plains of northwestern South Dakota. The winner is: somewhere between the towns of Meadow and Glad Valley, SD you will be the farthest from a McDonalds -- 107 miles by crow and 145 miles by car.