The Esprit de Corps Challenge claims to be "open to mighty men and women ages 15 to 120 years," welcoming athletes, warriors, adventurers and the fearless. As a team-oriented "resilience" event, you'll want to gather a team of your toughest friends and family members for this race. Racers will face archery, tomahawk throwing, shotgun shooting, fire starting, canoeing, rapelling, climbing challenges and more for 11 miles. Additionally, the Esprit de Corps Challenge honors those lost on Sept. 11, 2001.