The Rock River Canyon 50K boasts a stunning course that traverses the highlands and secluded river valleys south of Munising in Michigan's Upper Peninsula. It kicks off at Valley Spur Lodge, winding along a lesser-known stretch of the North Country Trail towards AuTrain and through the scenic Rock River Canyon Wilderness. The route features 26 miles of single track complemented by 5 miles of dirt forest road, providing an immersive experience into the region's pristine backcountry. With an elevation change of 4390 feet over the 31 miles, runners can expect frequent, manageable ascents and descents, making it a highly runnable and fast course, especially suitable for experienced ultra runners. Its moderate, non-technical terrain also serves as an excellent entry point for marathoners seeking to transition into ultra distances.