The Rockin' Rockwoods 53k and 1/2 Marathon are simultaneous trail races that will be held across the scenic Green Rock Trail. The terrain ranges from hard pack dirt to loose uneven rock and extremely hilly, technical trails. The race capacity is a total of 150 runners. This is a challenging course of steep grades and rolling terrain. Runners will be treated to 95% single track with rocks, roots and creek crossings that make for a fairly technical out and back run. ** The Rockin' Rockwoods 53K (5200ft elevation gain) and 1/2 Marathon (2200ft elevation gain) are both out and back.