Seacoast Cancer 5K Run/Walk

Lace up for a race with a heart at the 13th Annual Seacoast Cancer 5K Run/Walk, set to take place on Sunday, September 20, 2026, in scenic Portsmouth, NH. This inspiring event, one of New Hampshire's largest road races, is held at the Mass General Brigham Cancer Institute at the Wentworth-Douglass Portsmouth Outpatient Center on the Pease Tradeport, creating a vibrant, "block-party" atmosphere that celebrates life and community support. Participants can choose between a 5K run/walk or a 1-mile walking loop, with a virtual option also available for those who wish to support from afar. The course itself is noted for being much flatter, offering an accessible and enjoyable experience for all paces on the Pease Tradeport.

More than just a race, the Seacoast Cancer 5K is a powerful fundraiser, having raised over $2 million to date, with every dollar directly benefiting local patient care and wellness services at the Mass General Cancer Center at Wentworth-Douglass Hospital. This vital support provides integrative therapies and comprehensive care for patients and their families throughout their cancer journey. The event fosters incredible camaraderie and spirit, drawing over 1,700 participants annually, all rallying in the fight against cancer. Typical race day conditions in late September offer ideal running weather, with highs around 71°F and lows around 51°F, and only a 12% chance of precipitation, ensuring a comfortable and memorable experience for everyone.