The Biggest Running Races in the U.S.

There is certainly no shortage of road races in the U.S. to pick from when looking for your next running challenge.

But if you prefer well-established, large-scale events packed with thousands of people, these 10 races saw the largest numbers of people crossing their finish line, including 10Ks, marathons and even the rare 8K distance.

Here are the 10 biggest road races, according to Running USA's most recent report.

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