Experience the thrill of the Half Distance Triathlon Boise, featuring a challenging 1.2-mile swim, 56-mile bike ride, and 13.1-mile run through Idaho’s scenic landscapes. Swim: 1.2 Miles in Lucky Peak Reservoir Start your race with a 1.2-mile swim in the clear waters of Lucky Peak Reservoir, beginning and ending at Barclay Bay. Athletes will enjoy a smooth transition from the water to Transition 1. Avg. water temp: 72°F (22°C). Bike: 56 Scenic Miles The 56-mile bike course offers a stunning ...