As you continue on your journey west on 7-11 road you will note a Falling Rock sign on your right. As you proceed, look to your left (south) at the weird, but awesome geological formations in the cliff walls. If you look up high on the cliff walls you can see small boulders and round rocks just hanging there, like they are immune to gravity. I don't know how they don't dislodge and come down. No doubt that's the reason for the Falling Rock sign. (There is the same sign as you travel east on the 7-11 Road as well). I just found this formation fascinating, so I placed a cache to note it! You are looking for a winter friendly bison tube. Be sure to bring your own pencil to sign the log. Pull well over to the side of the road to grab this cache.