About The Fundraiser
Participate in the 2026 50/31 Challenge by running 50 miles in 31 days in support of the National Brain Tumor Society!
50/31 is back for Year 6! What started as a friendly competition in 2020 has turned into an annual tradition that brings people together for one month every year to support an amazing cause.
What is the 50/31 Challenge?
50/31 is a month-long fitness challenge and fundraiser where you run 50 total miles in the 31 days of May in support of the National Brain Tumor Society. Since working with NBTS in 2021, the 50/31 Challenge has raised over $100,000 from thousands of participants and donors.
Why participate?
• To get active/in better shape
• To support a good cause
• To try something new (if you’re not a runner, same…most of us aren’t)
How does it work?
The challenge is through the Nike Run Club app. Download the app, create an account, and join using the link below.
When it’s time to run on May 1st, open your NRC app and go to “Run” on the bottom. Press “START” to log your run it will toward the challenge. After your run, refresh the leaderboard to see your progress and where you stand amongst all participants!
Please sure to:
• Buy 50/31 merch! A portion of the proceeds will go to NBTS
• Follow the 50/31 Instagram account for updates
• Spread the word! It’s more fun with friends
Download the Nike Run Club (NRC) app and join here!
2026 50/31 Merchandise
All proceeds from the sale of our merchandise in the month of May will be donated to the National Brain Tumor Society.
Follow the 50/31 Instagram
Frequently asked questions
Does it cost anything to participate?
Can I use my Apple watch?
Can I use a treadmill?
Can I walk instead of run?
Can I bike?
Is there someone I can contact with specific questions?
About the National Brain Tumor Society
National Brain Tumor Society (NBTS) unrelentingly invests in, mobilizes, and unites the brain tumor community to discover a cure, deliver effective treatments, and advocate for patients and caregivers.
Building on over 30 years of experience, we are the largest patient advocacy organization in the United States committed to curing brain tumors and improving the lives of patients and families. With thousands beside us, our collective voices and actions are a powerful force for progress.
Our donors, volunteers, and partners fuel our work and accelerate breakthroughs in brain tumor research. We will not stop until we defeat brain tumors once and for all. Join us at BrainTumor.org.