For those who dream of taking on some of the nation's toughest extreme mud runs, Your First Mud Run is the perfect soggy training ground. More family-friendly and less aggressive than the aforementioned gauntlets, Your First Mud Run allows kids as young as five to participate, and can run right alongside their parents. The Your First Mud Run series still offers the thrills of a 5K mud run, just with a lowercase k. Every Your First Mud Run race features two miles of wily challenges, which typically include scaling a 6-foot wall, hopscotching through the tires of destruction, slithering through the treacherous tubes, and mud-sliding across the finish line. Proceeds from every race benefit charities such as the Family Reach Foundation.