Dave Hahn has reached the summit of Mount Everest twelve times (out of 16 tries), more than any American climber. He has guided climbers to the summit of Mount Rainier more than 250 times, and has led 27 attempts on Denali, reaching the summit 20 times. Dave holds the world record for Vinson Massif in Antarctica - he has reached the summit 27 times. In 2006 Dave led a team of professional athletes on an expedition to ski Mount Everest. In 1999 Dave participated in the expedition that discovered and identified the remains of explorer George Mallory, who died trying to scale Everest in 1924. Dave has been on seven expeditions to the island of South Georgia and has led trekkers overland on the "Shackleton Traverse", which in 2004 won Outside Magazine's Trip of the Year Award. He has participated in many visits by ship to the Antarctic Peninsula. Dave shot high-altitude video for the PBS NOVA program Lost on Everest, and guided a film crew into the Ellsworth Mountains of Antarctica on a journey of discovery that resulted in the Emmy-Award-winning film, Mountains of Ice.