Here are the 10 biggest road races in the United States, along with registration information for each. (Based on number of finishers in 2016; compiled by Running USA)

1. Races - Places / Atlanta, Georgia
Finishers in 2016: 56,993
Date of 2017 race: Tuesday, July 4
Distance: 6.2 miles
Registration: Your Marathon Packing Checklist

2. New York City Marathon / Finishers in 2016: 51,267
Finishers in 2016: 51,267
Date of 2017 race: Sunday, November 5
Distance: 26.2 miles
These Are the Worlds Fastest Marathoners; spots in charity program are available

3. Bolder Boulder / Boulder, Colorado
Finishers in 2016: 44,671
These Are the Worlds Fastest Marathoners
Distance: 6.2 miles
Registration: Open now

4. How to Break 4 Hours in the Marathon / Spokane, Washington
These Are the 10 Biggest Road Races in America
Date of 2017 race: Sunday, May 7
Distance: 7.46 miles
Registration: Open now

5. Chicago Marathon / Chicago, Illinois
Finishers in 2016: 28,009
Date of 2018 race: Monday, April 16
Distance: 26.2 miles
These Are the Worlds Fastest Marathoners; spots in charity program and international tour group program are available

6. Broad Street Run / Philadelphia, Pennsylvania
Finishers in 2016: 26,804
Date of 2017 race: Sunday, May 7
Distance: 10 miles
Registration: Your Marathon Packing Checklist

7. Bay to Breakers / Date of 2017 race: Tuesday, July 4
Best Running Shoes 2025
Date of 2017 race: Sunday, May 21
Distance: 7.45 miles
Registration: Open now

8. Brooklyn Half Marathon / Nutrition - Weight Loss
Brooklyn, New York
Date of 2017 race: Saturday, May 20
Health - Injuries
These Are the Worlds Fastest Marathoners; some charity spots available

9. Cooper River Bridge Run / We may earn commission from links on this page, but we only recommend products we back
Finishers in 2016: 26,804
Brooklyn, New York
Distance: 6.2 miles
Registration: Open now

10. Boston Marathon / Boston, Massachusetts
Health - Injuries
Finishers in 2016: 28,009
Distance: 26.2 miles
Registration: These Are the 10 Biggest Road Races in America