The Full Distance Triathlon Tallinn presents a unique challenge with its 3.8 km swim in calm Lake Harku waters, a 180 km bike course through rolling Estonian countryside, and a 42.2 km marathon weaving through historic Tallinn streets. This 36-week Full Distance Triathlon training plan is expertly designed to prepare you physically and mentally for every aspect of this race. ✅ Build a strong endurance base: The initial 12-week base plan lays the foundation by gradually increasing your aerobic ...