Ski Mountaineering in Rocky Mountain National Park is some of the most accessible and  dramatic in the lower 48 states.  The season typically lasts from November to June with approaches of 1 to 3 hrs.  Only  2hrs. from an international airport (DIA) and with skiing at altitudes from 9,500' to 14,200', this mountain range accessed from Estes Park is a world-class backountry skiing destination.