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.
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 →Get to the start early enough to settle your breathing and find your swim rhythm. Do a short, controlled warm-up (easy 5–10 min swim or progressive kick/pull) and practice a few strong-but-relaxed starts so you can move up once the field opens. If there are clear lanes/groups, seed based on your sustainable pace and plan to sight frequently from the first 5–10 minutes rather than every few strokes later. Off the final buoy, focus on clean form and staying calm—your goal is a smooth exit and organized transition, not heroics.
You’ll cover 1,948 m in freshwater where the temperature varies, so keep your first 200–300 m conservative and let your body adapt rather than going out hard. Because swim conditions can change with water temp and current, prioritize steady breathing, efficient line-sighting, and minimizing extra distance—small course deviations add up over 1.95 km. As you approach the exit, gradually reduce effort to avoid blowing up before T1 and to keep your heart rate controlled for a quicker transition. Fueling-wise, during the swim focus on hydration readiness; if you use gels/drinks, take only what you can tolerate immediately after the swim—most athletes start their main carb intake on the bike.
Swim to control: arrive at T1 composed, with your breathing settled and your line straight so you can start the bike smoothly.
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.
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.
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.
Plan T2 around getting your stride back fast without forcing it. Off the bike, you should feel heavy at first—your job is to gradually re-find rhythm by keeping the first few minutes controlled and letting the flat/fast course build your legs rather than sprinting into discomfort. Use a simple cue: “spin the first part, then settle into pace.” Have your nutrition organized at T2 so you’re ready to take fuel early on, before you’re thirsty or behind schedule. Think of the first 1–3 km as execution time: posture tall, cadence comfortable, and breathing steady.
You’ll run 21.1 km on a flat/fast profile with only 31 m of elevation gain, which means your pacing discipline matters more than terrain. With air temperatures ranging from about 12°C up to 24.7°C and moderate heat overall, dehydration and overheating are the main late-race risks—drink regularly and don’t wait until you feel “behind.” Continue fueling to the per-hour targets: 90 g carbs per hour, 750 mg sodium per hour, and about 650 ml fluid per hour, adjusted to how the course aid stations line up so you take it consistently rather than in big chunks. The SW wind can still affect how hard you feel at various stretches; if you get a headwind, hold form and cadence and don’t let effort creep up, especially when the course feels easy.
Flat doesn’t mean effortless: keep early pacing controlled, fuel and hydrate to the targets, and let your consistency carry you through the heat and wind.
Because race-day conditions can shift, confirm the official wetsuit ruling and any local advisories in the official IRONMAN athlete guide before you commit to gear choices.
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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.