Karl Meltzer Will Take on the AT Speed Record (Again)

The champion ultrarunner will leave nothing to chance on his third Appalachian Trail record attempt

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VIDEO: Tackling the Bob Graham, England's Epic 24-Hour Challenge

Ricky Lightfoot ticks a classic off his bucket list

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VIDEO: An Insane Run/Scramble Up the U.K.'s Highest Peak

Taking a beautiful line up 4,414-foot Ben Nevis in Scotland

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