September 14, 2025 | Portsmouth, NH

September 6-13, 2025 – Virtual 5K (run or walk anytime, anywhere!)
September 14, 2025 – 12th Annual Seacoast Cancer 5K*
* Join us back in Portsmouth on the Pease Tradeport!

Get Ready to RUN. RAISE. RALLY. And ROCK!

Join us for the 2025 Seacoast Cancer 5K, one of the largest road races in New Hampshire, and step up in the fight against cancer on the Seacoast! This event is a celebration of life and the life-saving work of the Mass General Cancer Center at Wentworth-Douglass Hospital (formerly the Seacoast Cancer Center). Choose from in person or virtual registration options, rally your friends and family and make a difference for patients and families impacted by cancer in our community.

The Seacoast Cancer 5K is a rain or shine event!

The 12th Annual Seacoast Cancer 5K is back and we’re running in Portsmouth again! The festivities will be held at the Mass General Cancer Center at the Wentworth-Douglass Portsmouth Outpatient Center – located on the Pease Tradeport at 121 Corporate Drive, Suite 100 in Portsmouth, NH. Join us for that block-party feel while making an impact on local cancer patients and their families – and bonus – a much flatter 5K course!

Race Details

Join us for the 12th Annual Seacoast Cancer 5K Run/Walk – one of the largest races in New Hampshire!

Your Impact

Proceeds from the Seacoast Cancer 5K benefit patient care and wellness services that help patients and their families cope with a cancer diagnosis.

Learn More

Sponsorship Opportunities

Sign up today to join our efforts to provide cutting edge, compassionate cancer care to patients, survivors and their loved ones at the Mass General Cancer Center at Wentworth-Douglass Hospital.

Sponsorship Opportunities