January 3, 2023

2023 Semper Fidelis Challenge

Your favorite challenge is back with a few changes and a little extra motivation!

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2023 Semper Fidelis Challenge

In 2023, the Semper Fidelis Challenge will now encapsulate the Marine Corps Marathon Organization’s three premiere events and bring them together in an exciting new way. Runners who qualify for the challenge will complete the following live events:

SemperFi Challenge 2023


Finishers will receive all three event medals, plus an exclusive challenge medal. Additionally, individuals will now have the chance to compete for category awards. This year, a runner’s aggregate finishing times from the Marine Corps 17.75K, Marine Corps Historic Half and the Marine Corps Marathon will qualify an individual for a full array of Overall, Masters and Grand Masters awards for men and women. Who will be our 2023 Semper Fidelis Challenge Champions?

Please note that a finish in the Devil Dog Double or MCM50K no longer applies to the Semper Fidelis Challenge due to logistics with the new awards.


Participants interested in the Semper Fidelis Challenge should register for each event individually. There are no additional registration requirements. MCMO will monitor those who qualify in-house.

  • Registration for the Marine Corps 17.75K is closed. Eligible runners are those who completed the live event on Saturday, March 25.
  • Registration for the Marine Corps Historic Half is open now.
  • Registration for the 48th MCM is now open.

Register for the Marine Corps Historic Half

It’s the greatest half in history! Run through historic Fredericksburg from the retail hub of Central Park, through quaint downtown shops and restaurants, up Hospital Hill to a finish line bathed in stars and stripes.