The 10 Most Dangerous Running Trails in the US

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No. 1 – Grand Canyon

Miles: 42 mi.

Location: Arizona

Best Season: Fall

What to Bring: Water

Continuing with the theme of danger and beauty, while the Grand Canyon is a crowning achievement for many runners, it is also a perilous one. Temperatures that get well over 100 degrees combined with radical shifts in altitude crate a need for over 200 heat-related rescues each year. Make sure you don’t tackle the canyon in midafternoon heat. Your body could experience cramping, hallucinations and even the bursting of brain cells. That doesn’t mean you shouldn’t attempt a run the canyon, as those who have made it through consider it the experience of a life time. Just make sure you plan a head and drink lots of water, and, you know, avoid dying.

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