7. Night Marathon - Night Marathon (24 hours of Running)

The 7th edition of the "24 Horas a Correr Mem Martins – Sintra" will take place on May 9 and 10, 2026, in the picturesque Parque da Bacia de Retenção de Águas do Algueirão in Mem Martins, Sintra. Organized by the Clube de Praticantes Real Academia and the Junta de Freguesia Algueirão‑Mem Martins, this long-distance event offers challenging formats: the 24-hour run (individual and team), 12 hours, 3 hours, as well as the "Maratona Noturna." In previous years, the competition attracted around 200 participants – a sign of its growing popularity ([24hlx.com](https://24hlx.com/regulamento?utm_source=openai)).

The certified circuit (1,609.34 m) runs over asphalt, gravel, and wooden planks and is designed for fast lap times; it is homologated by the Federação Portuguesa de Atletismo ([racefinder.pt](https://www.racefinder.pt/pt/event/24-horas-de-corrida-de-mem-martins-sintra/?utm_source=openai)). The event is characterized by a festive-sporting atmosphere and offers comprehensive infrastructure: electronic timing, continuous catering, illuminated sections of the course, medical assistance, showers, safety equipment stations, as well as dinner and breakfast for long-distance runners ([racefinder.pt](https://www.racefinder.pt/pt/event/24-horas-de-corrida-de-mem-martins-sintra/?utm_source=openai)).

Historically, the event was first established a few years ago. The 6th edition in 2025 saw impressive performances: Luís Santos covered an impressive 207.605 km, while the winning team in the 24-hour relay race achieved over 300 km ([revistaatletismo.com](https://revistaatletismo.com/24-horas-a-correr-de-mem-martins-triunfos-de-luis-santos-e-andreia-pereira/?utm_source=openai)). Between editions, there were also supplementary formats such as "Putos da Corrida" for children, "Maratona Noturna," 6-hour runs, as well as 12- and 3-hour competitions ([sintranoticias.pt](https://sintranoticias.pt/2024/05/02/24-horas-a-correr-regressa-a-algueirao-mem-martins/?utm_source=openai)).

Registration is tiered: early birds receive lower rates (e.g., €50 for the 24-hour individual must be paid by December 31, 2025, then gradually increasing to €75 for later registration), teams pay up to €200 depending on the registration date ([24hlx.com](https://24hlx.com/regulamento?utm_source=openai)). The circuit is relatively flat with a minimal height difference of around 22 m, which supports speed and endurance racing ([prorunners.pt](https://www.prorunners.pt/noticia/18/1678/24-horas-a-correr-de-mem-martins/?utm_source=openai)).

For SEO optimized use: The article contains relevant keywords such as "24 Horas a Correr Mem Martins," "Sintra," "long-distance running," "Maratona Noturna," higher visibility through mention of price tiers ("early bird," "registration fee"), as well as mention of the increasingly strong number of participants (around 200), signaling to both search engines and interested parties that this is an established and growing event.

24h (Einzel), 24h Team (4 Personen), 12h, 3h, Nachtmarathon (42 km)