IRONMAN 70.3 Boise Boise, ID   Jul 25, 2026

Come and experience the stunning views of the Boise river, foothills and cityscapes of picturesque Boise. The perfect destination for outdoor enthusiasts and endurance athletes. Where nature and culture collide. Where adventure knows no bounds. Embrace the charm of the West.

SWIM: Surrounded by the Boise Mountains, this swim venue will be sure to impress! Starting in the pristine waters of Lucky Peak Reservoir, the 1.2 mile, one-loop swim, will start and finish in the easily accessible Barclay Bay area. Athletes will exit the water and head to Transition 1 located at the Barclay Bay Parking Area.

BIKE: Athletes will be greeted with a sweeping downhill upon exiting the Lucky Peak Reservoir area to start their 56-mile cycling journey. Riders can expect a rolling, scenic tour of rural Boise roads and neighborhood streets before ending their journey with a downtown finish at Transition 2.

RUN: The popular Boise River Greenbelt Trail plays host to the IRONMAN 70.3 Boise run course. The flat, 13.1 mile, 2-loop course, will be packed with shade and spectators as athletes wind along the Boise River to complete their 70.3 mile race in downtown Boise!

Swim: RESERVOIR
Bike: HILLY
Run: FLAT