Ice climbing is no longer just a subset of mountaineering. More and more adrenaline seekers climb frozen waterfalls and steep ice since the equipment for this high-risk sport has gotten better. For an extreme experience, try Mount Washington in New Hampshire. The weather changes fast and all the time and ice and snow is everlasting in many parts of the mountain. Alaska and Montana are friendlier. Ice Climbing in Glacier National Park is for the more experienced climbers.