Twenty years ago, the Oregon Horse Center in Eugene, Oregon held an indoor trail competition using log obstacles, water ponds, and dirt embankments to transform their arena into mountain trails. That event was the beginning of competitive mountain trail, where neatly dressed riders navigate an untimed, subjectively-judged course of obstacles typically found on wilderness mountain trails. In Canada, two organizations promote the sport — International Mountain Trail Challenge Association (IMTCA) Canada and the British Columbia Mountain Trail Association (BCMTA)— and each has their own rules, judging criteria, and obstacles.