Running USA recently reviewed 2015 statistics and compiled a list of the largest road races in the U.S. for that year. While some of the races are mainstays atop the list, a few are of note.

The top five largest races in 2015 were also the top five largest races in 2014—the Peachtree Road Race in Atlanta (54,752 finishers), the New York City Marathon (49,365), BolderBoulder (45,336), the Lilac Bloomsday Run (42,294) and the Chicago Marathon (37,395).

A few items of note:

  • Only six races topped 30,000 finishers in 2015. There were nine in 2014.
  • Among the top 50 largest road races in the U.S., 19 are half marathons.
  • The cities with the largest races? Chicago and Washington D.C. each had four races in the top 50.
  • The Rock ‘n’ Roll Marathon Series made the top-50 list nine times, led by Rock ‘n’ Roll Las Vegas (16th with 23,092 finishers).

Running USA also broke down the largest races in the U.S. by distance. Here are a select few:

1-Mile: NYRR Fifth Avenue Mile (6,320 finishers)

5K: Hot Chocolate 5K Chicago (23,096 finishers)

10K: Peachtree Road Race (54,752 finishers)

Half Marathon: Brooklyn Half Marathon (26,479 finishers)

Marathon: New York City Marathon (49,365 finishers)

The complete report can be found at Running USA.