Obstacle Course Racing (OCR)
OCR is a mass-participation, running-based sport in which competitors compete as individuals or teams to run a course and overcome obstacles. Courses vary in distance, with 5km or 10km distances being common but there are also ultra distances (over 50km) and sprint distances (100m). The running type and obstacles used also vary between courses, with there often being a combination of trail running, road running, and cross country running. Common obstacles used include crawls, walls, heavy object carries, monkey bar variations, and natural features such as mud pits or water crossings.