Nina Williams climbs "Midnight Lightning", a bouldering problem on the Columbia Boulder in Camp 4 of Yosemite National Park. It has been described as the world's most famous bouldering problem. The first ascent was by Ron Kauk in 1978; the first female ascent was by Lynn Hill in 1998.

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Shameless bouldering porn. One take. No cuts. Classic problems from the world over. Sixty to ninety seconds. „A mainline bouldering fix,“ with attitude.

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