Extreme North Dakota's Terrifying Run Amongst Innumerable Lost Souls

Extreme North Dakota's Terrifying Run Amongst Innumerable Lost Souls is an annual Halloween-themed trail running event held at Turtle River State Park in Arvilla, North Dakota. The race offers multiple distances including 6, 12, and 24-hour solo runs, a 12 or 24-hour team relay called Skeleton Army, and a shorter ~10k Imp run for those seeking a less time-intensive challenge. The course features a mix of winding single-track trails, fast and flat double-track sections, gentle undulations, and a short stretch of pavement, providing a scenic and varied running experience.

Participants aim to complete as many laps as possible within their chosen time frame. Visit the organization's website for the most recent information.