The ExtremoSul competition is the largest beach sand competition in the world, a 223km course from Rio Grande and Chui to Santa Vitória do Palmar, Rio Grande do Sul, Brazil. It is a non-stop ultramarathon with a maximum completion time of 54 hours.

The inscriptions are held at the link: extremo-sul.com/produto/inscricao-extremo-sul-pioneiro-3/, the proof is limited to 100 entries.