Takes runners through spectacular Cedar Canyon in Southwestern Utah. Perfect high-altitude trainer for those preparing for full marathons held a few weeks later, including the St. George Marathon. This 13.1-mile course is one of the nation’s fastest as it winds through diverse geological formations. Coal Creek Trail Run: is a new addition to the Cedar City Half Marathon race day. We have formally retired the 5K and have introduced the Coal Creek Trail Run (about 3 miles).