We have rescheduled from the July date to September 18th & 19th. Spread the word. The Marmaton Massacre Festival is a 2-day event, in it's 7th year, on Gunn Park Trails, in Fort Scott, KS. The Marathon race on Saturday, followed by other activities and live entertainment, and the Category races start at 9:00 am on Sunday morning. Camping is free for the weekend.