The VII Edition of the 24 Hours Running Mem Martins – Sintra is a long-duration endurance running event that will take place on May 9 and 10, 2026, in Mem Martins, Sintra. The event features multiple race options including 24-hour, 12-hour, and 3-hour races, as well as a Night Marathon, all held on a certified closed-loop circuit of 1,609.34 meters.

Open to individual athletes and teams (for the 24-hour race), this competition welcomes both federated and non-federated runners aged 18 and above. The courses offer a unique combination of asphalt, dirt, and wooden boardwalk surfaces within the scenic Parque da Bacia de Retenção de Águas do Algueirão, creating a distinct and varied terrain for participants.

With a festive and challenging atmosphere, the event also includes team competitions and awards for top finishers, making it ideal for endurance athletes seeking to push their limits in a well-organized and supportive environment.