Great Falls is a 140.6-mile test of endurance, restraint and precision. For a competitive Masters 40+ athlete, the challenge is not finding more hours to train. It is making every hour count. This 24-week Full Distance Triathlon training plan brings structure to your pursuit of the inaugural 2027 Montana race. THE COURSE. THE RESPONSE. 2.4-mile Missouri River swim, one loop: Video-guided swim drills and open-water sessions develop efficiency and confidence for a continuous river swim. ...