One Team. 13.1 Miles. One Relentless Mission.

Together, we’re turning every mile into meaningful progress for the rarest cancers.

Ultra-rare sarcomas and other ultra-rare cancers are too often overlooked. Small patient populations can mean limited data, fewer dedicated clinical trials and far less research funding. Patients and families may struggle to find reliable information, experienced specialists and treatments developed specifically for their disease.

Rare But Relentless Foundation was created to help close this gap. By fostering collaboration and advancing research, we are working toward a future in which no diagnosis is overlooked simply because it is rare.

Support Our Mission

Why We’re Running

In January 2026, Rare But Relentless Foundation founder and president Zach Rothschild completed the Life Time Miami Half Marathon without knowing that an aggressive tumor was growing in his right thigh.

Six weeks later, an incidental scan revealed the mass. Zach was diagnosed with an ultra-rare and aggressive sarcoma and began an intensive treatment journey that included chemotherapy, radiation and major surgery to remove the tumor along with portions of the surrounding muscle. The operation left him with significant weakness and a long rehabilitation, requiring him to rebuild his strength step by step.

The rarity of Zach’s diagnosis made the experience especially isolating. There was no established treatment protocol developed specifically for his cancer, very little disease-specific evidence to guide decisions and few patients with the same diagnosis to connect with or learn from. Even with access to expert care, he found himself searching across institutions for specialists, relevant research and possible treatment options.

Rare But Relentless Foundation grew from a determination to make that path less isolating for others—and to help ensure that cancers affecting very few people still receive the research, collaboration and urgency they deserve.

Returning to Miami with a team representing the Foundation is about far more than one person crossing another finish line. Every mile will represent patients and families facing the rarest cancers—and the researchers working relentlessly to give them better answers, better treatments and greater hope.

Our $50,000 Goal

Funds raised through the Rare But Relentless Miami Half Marathon team will support the Foundation’s work in two critical areas:

Turn promising science into treatment possibilities: Support laboratory studies, disease-model development, drug testing and the additional validation needed to move the strongest findings closer to clinical investigation.
Give researchers enough shared data to make progress: Help connect genomic findings, patient data, tumor samples and experimental models across institutions so researchers can learn from a larger collective group rather than a handful of isolated cases.

For ultra-rare cancers, even a focused investment can help generate essential evidence, connect previously separated resources and position promising work for larger grants and future studies.

Join the Team

You can make a donation, join us as a runner or create your own fundraising page and share it with your community. Every contribution—at any amount—helps build momentum for cancers that have gone overlooked for too long.

Every mile has meaning. Every supporter strengthens the mission. Together, we can help turn an ultra-rare diagnosis from an isolating search for answers into a more connected path toward progress.

Make Your Gift Today

Run With Us

Want to join the Rare But Relentless team in Miami March 7th? Tickets selling out fast!

Register for the official Life Time 305 Half Marathon & 5K, then come back here and select “Become a fundraiser” to create your personal fundraising page and help us raise funds for ultra-rare cancer research.

REGISTER FOR THE 305 RACE

https://www.letsdothis.com/us/o/179281/checkout/ticket?preferred=true&eventId=268183&occurrenceId=21111176887&utm_organiser_id=179281

DISCOUNT CODE:

HALF: 27RBR305
5K: 27RBR305K

LEARN MORE ABOUT OUR MISSION →RareButRelentless.org

One Team. 13.1 Miles. One Relentless Mission.

Together, we’re turning 13.1 miles into meaningful progress for the rarest cancers.

Team Members