5 Marathons in the Biggest US Cities
Philadelphia Marathon
Where: Philadelphia, PA
When: Sunday before Thanksgiving
Approximate Finishers: 10,500
Register: philadelphiamarathon.com
Houston Marathon
Where: Houston, TX
When: Third Sunday in January
Approximate Finishers: 7,000
Register: chevronhoustonmarathon.com
Chicago Marathon
Where: Chicago, IL
When: Second Sunday in October
Approximate Finishers: 41,000
Register: chicagomarathon.com
LA Marathon
Where: Los Angeles, CA
When: Mid February
Approximate Finishers: 22,000
Register: lamarathon.com
NYC Marathon
Where: New York, New York
When: First Sunday in November
Approximate Finishers: 50,500
Register: tcsnycmarathon.org
Photos from Runners World.