What Is a Trail Running Festival ? Trail Running Festival is a one day trail running celebration bringing a few distances to some of the most iconic cities trail systems in the country - around a 5K, 10K, 25K, and 50K, all on the same course network, all on the same day. This isn't a road race with a cone and a finish line. Every course is trail-built - natural terrain, elevation, dirt underfoot, and conditions that change by city. Some courses will occasionally touch gravel or pavement, but this is trail running at its core. Whether you're running your first trail 5K or tackling a 50K, you're out there on real trail, in a real race, surrounded by a community that showed up to do the same thing you did.See All Event Posts