Half Distance Triathlon Boise begins with an open-water swim in Lucky Peak Reservoir, followed by rolling rural bike terrain, and ending with a warm half marathon along the Boise River Greenbelt. Our Beginner’s Six-Month Half Distance Triathlon Training Plan is strategically designed to prepare you for every leg of this race with confidence and purpose. 🏊‍♂️ Swim-Ready Confidence The race begins with a 1.2-mile swim in the calm, clear waters of Lucky Peak Reservoir, where wetsuit-legal ...