Do you want a fast course, gorgeous scenery, and a euphoric experience? Join us for the 41st Anniversary of the GTIS Half Marathon and run a new PR. The Georgetown to Idaho Springs Half Marathon is one of the most pleasurable and must do runs in the western United States. The race course parallels Clear Creek and is a very scenic, gently rolling mountain course that winds down the Clear Creek Valley. Although the course is at high elevation (8500 ft to 7500 ft start to finish), it is a relatively fast one due to the gentle downhill nature.