Join Us for the 50th Marine Corps Marathon!

The Marine Corps Marathon is celebrating its 50th anniversary, and we are honored to be a Charity Sponsor for this milestone event. Known as "The People's Marathon," it brings together runners, spectators, and supporters in a shared spirit of endurance, dedication, and community. For us at Flex for Kal, this race holds special meaning—our founders, Kal's parents, proudly served as Marines from 2004 to 2014. This year, we run for those who can’t.

This is a historic moment for Flex for Kal—it marks our first major event! We couldn’t think of a more fitting way to launch our mission on a national stage than by raising awareness for rare diseases at one of the country’s most iconic marathons. Every step we take is a step toward hope, innovation, and support for those facing rare diseases.

At Flex for Kal, we believe in pushing limits and standing strong for those who need it most. Just as we flex for kids and individuals who can’t, this marathon is our way of running for those who can’t—turning every mile into a powerful statement of resilience and purpose. Our mission is to ensure that no family facing the challenges of a rare disease does so alone.

Event Details:

  • Date: October 26, 2025

  • Location: Washington, D.C. & Arlington, VA

  • Race Distances: 26.2 miles (Marathon), 10K, 50K (10K and 50K will be virtual only this year)

  • Start Time: 7:00 AM

Why Run for Flex for Kal? When you run with us, you’re doing more than completing a race—you’re fueling groundbreaking research, funding life-changing treatments, and providing vital resources for families impacted by rare diseases.

Perks of Joining Our Flex for Kal Team:

  • We cover your entry fee—just fundraise a minimum of $1,250 by the deadline!

  • Guaranteed entry to the 50th Marine Corps Marathon

  • Exclusive Flex for Kal apparel and merchandise

  • Personalized fundraising page

  • Fundraising and event support

  • Access to our exclusive Flex for Kal Running Facebook group to connect with fellow runners and supporters

  • The chance to be part of a passionate community making a real difference

Ways to Get Involved:

  • Run for Us: Sign up below and turn your miles into a movement.

  • Fundraise: Start a campaign and rally support from friends and family.

  • Donate: Every contribution brings us closer to better treatments and resources.

  • Cheer Us On: Join us on race day to support and inspire our team along the course.

How Your Support Makes a Difference Your participation helps us:

  • Fund research into innovative therapies and regenerative medicine for rare diseases

  • Provide access to life-changing treatments

  • Support families with vital medical equipment for caregivers and individuals diagnosed with rare diseases

  • Ensure athletes with rare diseases have access to adaptive sports programs and specialized equipment

  • Advocate for greater awareness and resources for the rare disease community

Together, we can turn every mile into hope, strength, and progress.

Sign Up Today! Be part of history and make an impact that lasts far beyond the finish line. Register now and join Flex for Kal at the 50th Marine Corps Marathon!

For more information, contact us at run@flexforkal.org.