Prepare to take on the Long Distance Triathlon Jacksonville Florida — a fast, scenic, and unforgettable race through the heart of the River City. This 36-week triathlon training plan is engineered to build the endurance, strength, and precision you’ll need to excel on race day — from the downriver swim in the St. Johns River to the flat, lightning-quick bike leg and the vibrant, bridge-crossing marathon through Jacksonville’s iconic neighborhoods. The program begins with a 12-week foundational ...