This guy was walking alongside the road between the Yellowstone east entrance and Cody, WY when we were headed to Yellowstone.
Since this was the first buffalo we'd seen I stopped and took a bunch of shots (from behind the car across the road). Later buffalo became so common I didn't pay any attention (except once when I got a dozen keepers better than this one - but haven't had time to process them yet as they're still in RAW format).