TSF 5K for Rare Neuroimmune Disorders 2026

The race.

The TSF 5K for Rare Neuroimmune Disorders takes place on September 13, 2026, in Weston, MA. The race covers 3.1 miles and benefits The Sumaira Foundation, a nonprofit organization funding research and support programs for rare neuroimmune disorders including neuromyelitis optica (NMO). Proceeds support the Foundation's SPARK and Unicorn grants for research projects. The Sumaira Foundation has funded over $1 million in rare neuroimmune disorder research, fellowships, and publications since 2018 through grassroots fundraising efforts.