In the heart of the Brazilian jungle, Darren and Arron took on a multi-stage, 300 kilometre ultramarathon, each racing independently. The race demanded not just endurance but survival, navigation, and an unyielding will to continue. Temperatures soared above 40°C, with suffocating humidity compounding every effort. The dangers were always present; venomous snakes, jaguars, biting insects, fire ants, and poisonous plants. The threat of getting lost was constant, with only seven checkpoints  in total across the entire course, water was often unavailable when the competitors could reach them.

They faced river crossings with caimans, swamps with stingrays, and the knowledge that just two weeks before the race, a local had been killed by a jaguar. Days before the start, the route was abruptly extended after a local village was burnt down in a tribal dispute. In addition to the extreme conditions, Darren sustained a serious injury when a set of spikes lodged in his arm; without the option for surgery in the jungle, the spike was pulled out on the spot, leaving fragments behind and causing significant risk of infection. Despite this, he pressed on, sleeping in hammocks at checkpoints and fighting paint. Darren and Arron successfully completed the ultramarathon raising vital funds for GOSH charity.