XTERRA Triathlon
XTERRA is a series of cross triathlon and other off road races races, i.e. three-sport races which include swimming, mountain biking, and trail running. XTERRA-branded triathlons, mountain biking, and running races are owned by the for-profit XTERRA Sports Limited, LLC. The XTERRA race series is the best-known series of cross triathlons, and is considered by most to be the de facto world championship of the sport.