5/1/05. The entrance to the right is the smaller 75 foot cave used by Sitting Bull and other native americans as a food locker. the temperature in the caves stays a cool 45 degrees year round. As stated, this is a vigorous tour with the initial descent being about a hundred feet to the vertical. A ladder broken into four sections with rest stops provides access. Most areas of the cave are only accessible by experienced cavers going in on their bellies.