This month, Samantha Larson, Appa, Rob Baber, and Bear Grylls have all made history on Mount Everest. And while their achievements are indeed noteworthy, one accomplishment - arguably the most significant event in outdoor history - on Everest started them all.

May 27, 1937: Golden Gate Bridge in San Francisco opened.

May 29, 1953: edmund hillary and Tenzing Norgay became the first to reach the summit of Mount Everest.

May 31, 1961: South Africa became an independent republic.

June 4, 1892: The Sierra Club, led by John Muir, was incorporated in San Francisco

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