IRONMAN 70.3 Texas

Arrive ready to settle quickly: do a short, purposeful warm-up that gets your shoulders moving and lets you find a comfortable breathing rhythm. Seed yourself based on swim ability, not just fitness—aim for space where you can draft legally and avoid repeated stops. In the first few minutes, keep strokes long and calm, prioritize sighting, and focus on consistent breathing rather than chasing early position.

You’ll swim 1855 m in water around 22.2°C; with wetsuit conditions described as legal, confirm the final ruling on race morning in the official IRONMAN athlete guide. With typical conditions, settle into a steady cadence and keep your line smooth—don’t overcorrect for minor chop or wind drift because it often causes unnecessary zig-zagging. Aim to stay relaxed through the first half so your arms and legs don’t feel “sticky” as you approach the exit. You should not be thinking about calories yet—save your fueling plan for the bike start where you can control intake and pacing more effectively.

Set up T1 so you can transition cleanly: keep your shoes/clips or running footwear placement easy to grab, and rehearse your helmet/gear order so you don’t waste time. During the first seconds on the bike, complete your mounting smoothly, get your cadence settled, and take a moment to check you’re comfortable with your bars and hydration position. Early in the ride, focus on controlled power and smooth breathing—this course is flat/fast, so it’s easy to start too hard.

The bike is 91.5 km with only 38 m of total elevation gain, so expect a fast, low-grind day—effort management matters more than climbing. Conditions include a 9.3 m/s wind from the SE, which often shows up as a crosswind or headwind component depending on where you are on course; keep your line smooth, avoid sudden steering inputs, and don’t chase every surge when the wind changes. Fueling target is 90 g carbs per hour, 750 mg sodium per hour, and about 650 ml fluid per hour—start intake early enough that you’re not “behind” by mid-ride. Because heat is moderate (air temps roughly 18.7–22.7°C), drink based on thirst while staying consistent with your fluid target; don’t wait for cramping signs to begin hydration. Practice taking carbs at a rhythm you can hold regardless of wind—aim for steady, repeatable grabs rather than big, late corrections.

In T2, prioritize getting up and moving: transition with a quick, efficient change into run gear, then spend the first 1–2 minutes finding tall posture, relaxed shoulders, and a cadence you can repeat. Off the bike on this flat/fast run (21.9 km, 35 m gain), your legs may feel either springy or heavy—match the feeling with controlled pacing so you don’t surge early and pay later.

You’ll run 21.9 km with 35 m elevation gain on a mostly flat/fast profile, so the biggest risk is going out too hot while the course feels easy. With moderate heat and air temperatures around 18.7–22.7°C, use the wind and sun cues to judge effort—if the SE wind is helping at parts of the course, resist the urge to “spend” that advantage with a faster pace you can’t maintain. Since you’re carrying the day’s work from the bike, keep strides controlled and focus on consistent form: steady cadence, quick feet, and smooth transitions through each step. On a 70.3 run, your fueling should already be organized from the start; keep intake consistent and use fluid stops to protect your stomach and reduce heat stress rather than waiting until you’re thirsty.