6. Jim Collins, management guru
Jim Collins, management guru
He may not be a CEO, but Jim Collins, author of such management classics as Good to Great, is a major figure in the C-suite world, and in many ways an outdoor influence on the very people he writes about.

Collins, 53, has been a lifelong rock climber, and it isn't unusual to see him using analogies about "the mountain turning on you" or business leaders finding themselves "dead on the mountain" in interviews and books. During his time at Stanford Business School, he even ran a small rock-climbing school at nearby Yosemite National Park. Collins also happens to be married to Joanne Ernst, a triathlete and 1985 Ironman winner.

Last updated July 12 2011: 5:15 PM ET
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