The Biggest 5Ks in the U.S.

For new and veteran runners alike, the 5K is a popular race choice, with hundreds of thousands—maybe even millions—of runners signing up each year. They are fast, fun and more affordable than longer distances, while still packing enough mileage to present a challenge.

Here are the 10 biggest 5K races in the U.S., according to Running USA’s most recent report.

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