IRONMAN 70.3 Boise
July 25, 2026
Boise, Idaho · Boise, United States
About
Experience stunning views of the Boise river, foothills, and cityscapes. A reservoir swim, hilly bike, and flat run set in the picturesque capital of Idaho.
Pick your distance
Everything below adapts to your choice
Start
Boise, Idaho
Weather
Sunny 30°C
Why this race
- Official Ironman 70.3 series race
- Globally recognized branded triathlon series
- Standard 70.3 distance on ironman.com
If you like Ironman 70.3 Coeur d'Alene or Ironman 70.3 St. George, you'll like this one.
Pack this
- Wetsuit (check legality - water often >24.5°C cutoff)
- Tri-suit, swim cap, goggles (tinted + clear backup)
- Bike with tuned brakes, helmet, two bottles + electrolyte mix
- Race nutrition: 60-90g carbs/hr (gels, chews, salt tabs)
- Photo ID + USAT license, sunscreen, running visor
What you should know
- Mandatory pre-race bike check-in and gear-bag drop the day before; transition closes ~15 min before start.
- Helmet must be buckled before unracking the bike in T1 and stay on until re-racked in T2 - DQ if not.
- No headphones, no drafting (12m draft zone on bike); penalty tent enforced by motos.
- Course cutoffs: ~1:10 swim, ~5:30 bike, ~8:30 overall from your wave start - plan pacing accordingly.
- July heat in Boise can hit 32°C+ on the run; pre-cool, drink at every aid station, watch for heat illness.
Based on 1 source
The information shown here is based on the most recent listing we could find, and may change. Always confirm details on the event's official site before registering.