Half Distance Triathlon Boise: Train Smart for Idaho’s 70.3-Mile Challenge Your journey begins with a 1.2-mile swim in the clear, calm waters of Lucky Peak Reservoir, averaging 72°F (22°C)—a wetsuit-friendly environment that sets the tone for a confident start. Transition 1 (T1) is located at Barclay Bay, ensuring a seamless move onto the 56-mile bike course, which rolls through Boise’s peaceful countryside and ends in downtown Boise at Transition 2 (T2). The race concludes with a flat ...