11,000 feet is high enough for me!

As we left Yellowstone Park today we went to the Northeast into Montana. We knew there was some kind of mountain pass that went over the Rockies, but we didn't have any details. So on and on we went - and up and up. It was a spectacular drive up and over the top of the highest mountain I have ever driven over. What an exciting time, topping out at over 11,000 feet. It felt like we were on top of the world. At one point we were up in the frozen snow and glacier territory!