Marine Corps Marathon

The ninth marathon in the 1K12M challenge is the Marine Corps Marathon, which will take place on Sunday, October 29, 2023.

The Marine Corps Marathon starts and finishes in Arlington, Virginia, but the bulk of the course is in Washington, D.C. It is now the fourth-largest marathon in the United States and the ninth-largest in the world.

Supporting transplant centers:

  • MedStar Georgetown University Hospital
  • Walter Reed National Military Medical Center

1K12M and the NKR

The National Kidney Registry is sponsoring the 1K12M (1 Kidney, 12 Marathons) challenge, in which kidney donor athletes Matt Cavanaugh and Hilary Baude will complete 12 marathons within one year—shattering the misperception that kidney donation imposes physical limits on donors. Along the way, they hope to raise awareness for the need for living kidney donors like themselves and motivate other athletes to consider donation.

Other organizations offering support:

For more information on 1K12M, contact Matt Cavanaugh at For more information on the Marine Corps Marathon, visit

Financial Contributions

If you would like to support 1K12M in its efforts to raise awareness for living kidney donation, please consider making a financial donation to the National Kidney Donation Organization (NKDO).

Founding Sponsors

  • National Kidney Foundation
  • National Kidney Registry
  • National Kidney Donation Organization

Supporting Sponsors

  • Transplant Genomics
  • Penn Medicine Transplant Institute