70.3 Boise

Saturday 26 July 2025
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US Boise Idaho, United States
70.3 Boise race will kick off in the pristine waters of Lucky Peak Reservoir, with a 1.2-mile swim starting and finishing in the easily accessible Barclay Bay area. Once out of the water, athletes will head to transition 1 located at the Barclay Bay Parking Area. Athletes will be greeted with a sweeping downhill ride upon exiting the Lucky Peak Reservoir area to start their 56-mile cycling journey through the region. Athletes can expect a rolling, scenic tour of rural Boise roads and neighborhood streets before ending their bike journey with a downtown finish at transition 2. The popular Boise River Greenbelt Trail will play host to the IRONMAN 70.3 Boise run course. The flat, two-loop, 13.1-mile course, will be packed with shade and spectators as athletes wind along the Boise River to complete their journey in downtown Boise.


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