ULTRALOUCOS BACKYARD is an endurance race that challenges participants’ physical and mental limits. Part of the North American Backyard Ultra franchise, the event follows a last-athlete-standing format, where competitors repeatedly complete laps until only one remains. There are no age or gender categories, and all athletes compete together under unified rules. The event emphasises sustainability through the use of reusable cups and conscious waste disposal. Athletes receive a kit with an official T-shirt, personalized mug, chest number, food, hydration, and a participation medal. The event takes place at Rancho do Rubinho, known for its natural landscapes and welcoming atmosphere.