This Sunday, Oct. 1, 2017, photo provided by HOKA One One shows professional trail runner Tim Freriks, 26, running to break the single crossing record (rim-to-rim, or R2R) in the Grand Canyon, Arizona. Freriks ran the 21-mile route in 2 hours 39 minutes 38 seconds. Freriks blazed from the North Rim to the South Rim at a blistering pace, crossing the 21-mile (34-kilometer) chasm to claim what is called the “fastest known time,” or FKT. (Sunny Margerum/HOKA One One via AP)
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