The Dark Horse Trail Series, featuring a marathon, half marathon and 10K, will be held August 22 at Tryon International. (Photo courtesy of TIEC)Getting your Trinity Audio player ready...MILL SPRING—Runners of all experience levels will hit the trails at Tryon International on Saturday, August 22, when the Dark Horse Trail Series returns with marathon, half-marathon and 10K races beginning at 8 a.m. Runners may choose from three distances: a marathon, half marathon or 10K. All finishers will receive a commemorative medal, and following the races, participants can enjoy live music, food and beverages during post-race festivities. The event is organized by Upstate Race Series, with a portion of the proceeds benefiting local nonprofits.