New Zealanders Graham Charles, 36, Marcus Waters, 36, and Mark Jones, 37, attempt the first unsupported traverse of the CORDILLERA DARWIN, a range of glaciated 8,000-foot mountains at the tip of South America.
British mountaineer Christian Bonington, 68, heads to OMAN, on the Arabian Peninsula, to climb the region's 3,300-foot limestone faces.
Mark Newcomb, 36, and a team of seven, including climbers Carlos Buhler, 45, and Ace Kvale, 46, attempt a winter ski-mountaineering expedition in Tibet's 22,800-foot SEPU KANGRI RANGE.
Thirty-three-year-old Scotsman Alun Hubbard begins a three-month expedition to SOUTH GEORGIA ISLAND to attempt first ascents of three mountains.
African-American climbers Elliott Boston, 33, Stephen Shobe, 46, and Jean Ellis, 55, join Conrad Anker, 40, for an attempt of Antarctica's highest peak, 16,067-foot VINSON MASSIF.
Blind mountaineer Erik Weihenmayer, 34, sets off to climb 16,023-foot CARSTENSZ PYRAMID in Irian Jaya, Indonesia.
Doug Scott, 61, leads a team to the border of India and Tibet to attempt 23,114-foot NYEGI KANGSANG, the last of the 23,000-foot peaks east of Bhutan yet to be climbed.
A Flemish expedition led by physician Paul Symons heads to LOW'S GULLY in Borneo, one of the world's last unexplored canyons.
Ed Viesturs, 43, visits 26,658-foot NANGA PARBAT, the 13th summit in his quest to become the first American to climb all 14 of the world's 8,000-meter peaks.
Australian adventurer Tim Cope, 24, begins a 30-month ski and kayak circumnavigation of the ARCTIC CIRCLE.
American Stephen Koch, 34, heads to Mount Everest to attempt a vertical snowboard descent of the HORNBEIN COULOIR and finish his quest to board the Seven Summits.