EventHorizon, endurance sport is a community of endurance enthusiasts of ALL levels. Many of us participate in the sport of triathlon (from sprint to Ironman) so we enjoy running and appreciate the beauty and benefits of all other types of self-propelled motion. The distinguishing benefit of this group is that it is organized by experienced AND Certified Multisport coaches living in the Boston area. There's no agenda or manifesto.  We meet up, train, socialize and that's it! We motivate each oth …