Mark has written about mountaineering (his book “Baffin Island: Climbing, Trekking, Skiing” was published in 2008), the environment, history, disappearing cultures and more, but his new book, “The Impossible Climb: Alex Honnold, El Capitan and the Climbing Life”, tells an insider portrait of the climbing community and the story of his ten-year friendship with Alex Honnold, which climaxes with Honnold’s free solo of El Capitan in Yosemite. Today Mark is one of National Geographic’s go-to writers for adventure-based stories and his work has also appeared in publications such as Outside, Men’s Journal, Rock and Ice, Climbing.
Mark has also worked extensively in the film and television industry, both in front of and behind the camera. His credits include work for National Geographic Television, NBC Sports, Warren Miller Entertainment, Teton Gravity Research and Red Bull Media House. Long regarded as one of the best storytellers in the business, Mark is highly sought after as a motivational speaker. He presents regularly for clients like General Motors, the Bank of New York, Vanity Fair Corporation, the X Prize Foundation and the National Geographic Society.
Mark is also an IFMGA guide, the the owner and director of one of the premier guide services in the east(Synnott Mountain Guides), and a trainer for the pararescuemen of the US Air Force. He is also a longtime member of the Mountain Rescue Service (MRS) and currently serves on the board of MRS and the Friends of Cathedral Ledge. He lives on a dead-end dirt road in the White Mountains of New Hampshire with his wife and four children.