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WATCH: The Evolution of “The Speedgoat”

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Karl Meltzer is a legend in the sport of trail ultrarunning. The now-49-year-old runner holds the record for the most 100-mile wins in the United States and the supported speed record on the Appalachian Trail (45 days 22 hours 38 minutes). He has won the Hardrock 100 five times and the Wasatch Front 100 four times, consecutively.

Better known by the nickname “Speedgoat,” Meltzer is the race director of one of the country’s most competitive mountain 50Ks named, appropriately, the Speedgoat 50K. His  nickname even made its way onto a well-known trail-running shoe.

This film, by shoe brand HOKA One One, details Meltzer’s formative years growing up in the woods of New England, how he found his way to trail running and, ultimately, became the founder of one of the country’s iconic trail races.

Related: Watch: Karl Meltzer on the Appalachian Trail