New discount to Little Miami Half Marathon in Morrow, Ohio‬ for Fifty States Half Marathon Club members, AUGUST event. The Little Miami Half Marathon and 10K near Cincinnati is a flat and fast scenic race run along the banks of the Little Miami River on August 16, 2015. Are you training for a fall marathon or half marathon? This Cincinnati Half Marathon is a perfect tune-up! Plus, the entire course is run on a shaded bike path, which is a big bonus during Ohio’s humid summer