IRONMAN 70.3 Boise 2026

Explore the mix of natural scenery and city energy in Idaho's capital, where IRONMAN 70.3 Boise guides athletes through a scenic, demanding course. This event provides a chance to compete through downtown Boise, along the Greenbelt, and into the nearby foothills, while benefiting the Challenged Athletes Foundation. The competition begins with a swim in the Boise River, followed by a bike leg in the foothills, concluding with a run on the Boise River Greenbelt Trail. This 2-loop run course is mostly flat and shaded, creating a lively atmosphere as you approach the finish. Each competitor supports the Challenged Athletes Foundation, helping ensure all can feel the accomplishment of finishing.