Head into the beautiful Mark Twain National Forest for this scenic adventure on the historic Berryman Trail, where you'll experience a roughly 26.4-mile single-track loop with continuous elevation changes totaling 2,500 feet of climbing and descending per loop. Marathon runners will complete one loop, while those tackling the 50+ mile distance will push through two loops of fully forested terrain. Be prepared for a challenging, nature-immersed experience with plenty of ups and downs throughout.