Udall has said there isn't a Coloradan out there who doesn't cycle, hunt, hike... We're an outdoor state. It fits our worldview, and it's how we define ourselves. An experienced mountaineer, Udall has climbed many peaks during his work as an Outward Bound instructor, and in his personal life. Udall has climbed Colorado's 100 tallest peaks, known as The Colorado Centennials, as well as Mount Kangchenjunga in the Himalayas and Mount Aconcagua, the highest peak in South America. He has also attempted Mount Everest multiple times.