Mark the Mountain Guide author, Mark Seaton, is a British mountain guide who lives with his wife and children in the Chamonix valley. He guides climbers and skiers in the French, Swiss and Italian Alps. Seaton's accomplishments as a professional mountain guide include the first complete unassisted British guided ascent of the Eiger Nordwand with his client Charles Sherwood in 2007. In 2008, Seaton & Sherwood teamed up again to complete a traverse of Mont Blanc via an ascent of Aiguille Blanche de Peuterey, the most difficult 4000-m summit in the Alps. In 1996, Mark led Don Planner, the first blind man to climb
Snowmass Mountain for travel on the snowfield. Later in the summer there is more travel on talus (scree) and more danger from rockfall. An alternative in snow-free conditions is to hike up to the saddle between the peak and Hagerman Peak. From that point there are climbers' trails which proceed on the opposite (west) side of the ridge to the summit. A different and much less used route climbs the west side of Snowmass Mountain from Geneva Lake, which is accessed from the North Fork of the Crystal River. Snowmass Mountain Snowmass Mountain is a fourteen thousand foot mountain in the U.S.