How do you make a marathon more intense? Try throwing in snake-infested swamps and dense jungle swarming with mosquitoes. That’s what you’re in for at the Jungle Marathon in Brazil's Para state, where prepping for the starting gun requires several safety briefings, “jungle-training” seminars, medical checks, and acclimatization runs. Competitors begin the marathon from a jungle base camp accessible only by an overnight boat ride. From there, they run along logging trails and hunting paths through canopied Amazonian rainforest, contending with knee-deep mud, river crossings, and 100-degree temperatures along the way.
Race Date: October 3, 2013