A 5K is 3.1 miles long.
That's the simple answer, but here's some more context and information about this popular race distance:
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A 5K is a 5-kilometer race.
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5 kilometers is equivalent to 5,000 meters.
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On a standard 400-meter outdoor track, a 5K race would require running 12.5 laps.
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5K races are incredibly popular. In 2023, over 40,000 5K races were held in the U.S., with nearly six million registrations.