It’s a simple conceit – a slightly more than four-mile loop that you run once an hour until all your competitors have dropped out. All very straightforward, until you hear how far the winner ran ....
Run a single loop measuring 4.16667 miles within a single hour. Now do it again. And again. Now keep doing it – starting a new loop on the hour, regardless of how fast you finish the previous one – until there’s only one runner willing or capable of doing so. Welcome to the simple – some might say sadistic – concept of the Big Dog Backyard Ultra in Bedford County, Tennessee.
“The apparently weird loop-distance has in fact been carefully chosen so each 24 hours equals running a perfect 100 miles,” says Guillaume Calmettes, the Frenchman who is the current Big Dog Backyard Ultra champion. “Another twist is that every 12 hours you change between a daytime trail loop to a night-time road loop, and because the road loop has less elevation gain – and is of course less technical – than the trail loop, then reaching the road loops gives you the opportunity to get a bit more rest time in between loops, and more time to take care of yourself before starting the next one.”
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