Ultra BM begins and ends in Bertioga, on the coast of Sao Paulo state in Brazil, offering a long 75 km ultra and a 42.20 km marathon option. It takes place in October and is designed for runners seeking a challenging mixed-surface day rather than a road-only event.
The course incorporates sand, trails, and roads, requiring careful pacing and footwork alongside raw fitness. Organizers present it as one of Brazil's more demanding endurance events. They also accommodate groups and running clubs with special entry terms, alongside practical race-day arrangements such as complimentary parking.