Seixal Bay Half Marathon

Run alongside the shimmering waters of the Tagus estuary at the **Meia Maratona Baía do Seixal on Sunday, March 22, 2026**. This officially homologated event, certified by the Portuguese Athletics Federation and World Athletics, transforms the waterfront communities of Seixal and Amora into a 21.097km celebration of speed, endurance, and community spirit. Three distinct distances accommodate every ambition: the championship half marathon, a competitive 10km, and a welcoming 5km walk/run that invites families, first-timers, and those simply seeking the joy of movement along one of Portugal's most beautiful bays. It is a rare opportunity to race on a course measured to international standards while absorbing the authentic character of the Margem Sul.
The event represents a remarkable collaborative effort, organized by a consortium of seven local clubs including Clube Desportivo e Recreativo Águias Unidas, Clube de Atletismo de Amora, and Associação Naval Amorense, with technical direction from Werun and precision timing by WeTiming. The Câmara Municipal do Seixal and the parish councils of Amora, Arrentela, and Seixal lend their support, ensuring seamless execution across every domain: athlete kit collection, race secretariat, bengaleiro, showers, parking, and medical assistance along the route. This is grassroots Portuguese athletics elevated by professional rigor, delivered by people who know these streets and their running community intimately.

Registration remains open through the WeTiming platform, with categories and prémios structured to recognise excellence across age groups. Aid stations punctuate both the half marathon and 10km courses, while cancellation and refund policies are clearly articulated—transparency that reflects the organizing committee's respect for every participant. The start line, positioned along the Seixal bay, captures the essence of March in Lisbon's sister cities: mild temperatures, soft light, and the distinct sense that spring has truly arrived. Contact [email protected] for inquiries, and secure your place in an event that proves the Margem Sul runs as deep as the river it faces.