70.3

IRONMAN 70.3 Washington Tri-Cities

Sunday, 20 September 2026

IRONMAN 70.3 Washington Tri-Cities is a steady build: a ~1.95 km freshwater swim, a 90.3 km rolling bike with 526 m of climbing influenced by a SW wind, then a flat/fast 21.1 km run where heat and pacing decide your finish.

· 32 days to go
Air
12–25°
typical
Wind
4.5 SW
prevailing
Water
typical — confirm
Bike climb
+526 m
Fueling — per hour
typical conditions
90 g
carbs
750 mg
sodium
650 ml
fluid
  • 👍 Conditions are kind — the 650 ml/h fluid, 750 mg/h sodium and 90 g/h carbs baseline should hold. Fine-tune to your own thirst and sweat rate.
Based on 10-year typical conditions (~25°). Baseline for a ~5.5 h finish, 70 kg athlete. Scale to your own body mass and sweat rate.

Typical 10-year conditions, not a forecast. Water temperature and the wetsuit ruling are set on race morning — check the IRONMAN race guide →

Worlds qualification — slots TBAsee who qualified →
0 km45 km90 km279 m
90.3 km · +526 m climbing
T1 — swim to bike

Treat T1 like a gear-and-mindset reset: get your legs moving, shoes on cleanly, and settle your cadence before you fully chase speed. As soon as you’re comfortable in your clip-in/ready state, find your target power/effort and smooth out your breathing—don’t “spike” right away. With a rolling course and 526 m of elevation, plan to ride the hills with controlled surges and protect your run legs by not over-cooking the first big climbs. Keep the transition from swim to bike efficient: quick handling, minimal delays, and immediate focus on steady output.

During the bike

You’ll ride 90.3 km on a rolling profile with 526 m of elevation gain, so expect repeated changes in effort and make your pace decisions early. With wind at 4.5 m/s from the SW, your biggest bike challenge is likely handling any headwind/tailwind portions consistently—stay smooth on the “into” wind sections (hold effort, don’t sprint against it) and use the “with” wind to maintain rhythm without letting speed spike beyond control. On rolling terrain, keep power steady through the climbs rather than trying to win every rise; let descents restore some breathing and then re-form your pacing as the next hill approaches. Fuel during the bike to your targets: aim for 90 g carbs per hour, 750 mg sodium per hour, and about 650 ml fluid per hour—measure what you’re taking so you don’t under-fuel in the early middle of the ride.

Closing notes

Roll-smart, wind-smart: smooth power over hills, steady effort into the wind, and hit your 90/750/650 targets so the run starts fueled.

Results by year

Every edition of this race in our database. The course and conditions can shift year to year — see who qualified and the World Championship slot rolldown for each.

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Weather is a 10-year climatology (typical, not a forecast). Course tracks are approximate, derived for planning — verify against the official course. Maps © OpenStreetMap. Not affiliated with or endorsed by the IRONMAN Group.