Philadelphia, Pa – Elite-level talent will combine forces on the streets of Philadelphia for the Philadelphia Distance Run (PDR) on Sept. 18. 2016 Olympian and 2020 Paralympic gold medalist Greg Billington (Spokane, Wash.) will serve as a guide runner for 2020 Paralympian Kyle Coon (Carbondale, Colo.) during the half marathon event. Coon is one of 26 visually impaired runners participating in the annual race in conjunction with the U.S. Association of Blind Athletes (USABA).