Yellowstone National Park rules say that 25 yards is the minimum safe distance for viewing Bison. Sometimes maintaining that distance is not possible. A couple of weeks ago in Yellowstone, we stopped our van to watch a small herd of mostly cows and calves cross the road in front of us and continue up the snowy slope on the other side. This cow was determined to walk right past the open van door and couldn’t resist peeking inside as she passed by. Well, hello, there!