IRONMAN 70.3 Western Australia

Get to the water early and use a short warm-up to loosen up your shoulders and hips so your first 5 minutes are smooth, not rushed. Seed yourself based on your expected swim pace to avoid traffic in the first stretch. Start controlled: settle into rhythm quickly, keep your breathing consistent, and don’t sprint through the first buoys—save that intensity for the middle third.

This is a 1903 m open-water swim in typical conditions around 21.7°C; the official wetsuit ruling is set on race morning, so confirm in the Ironman athlete guide before you commit. Expect choppy moments if the breeze picks up, so stay relaxed through the shoulders and avoid over-correcting your line. With the course being an open-water swim, prioritize clean sighting and a straightest-practical line to protect your time and energy. Fueling during the swim isn’t the priority—focus on getting to T1 calm and ready to drink immediately on the bike.

In transition, set up for quick changes: cap/goggles away, shoes where you can grab them immediately, and practice a clean mount so you’re not fighting your bike in the first minute. As you come out of the water, take a breath, get your first swallows of planned fluids ready, and clip in before you accelerate. The first 10–15 minutes should feel like controlled build—find your power/effort you can hold comfortably on a flat/fast 90.4 km course.

You’ll cover 90.4 km on a flat/fast profile with only 73 m elevation gain, which means speed will come easily but pacing mistakes show up later. Plan to ride into the wind at consistent effort; with wind listed as 7.2 m/s from the S, expect effort and feel to vary as you move relative to headwind/tailwind sections. Keep your cadence stable and smooth—don’t chase every gust; instead hold your target effort range and let the course come to you. Fueling target is 90 g carbs per hour with 1000 mg sodium per hour and about 800 ml fluid per hour—sip regularly, aiming to stay ahead of thirst rather than “catch up” later. If you tolerate it, take fluid early and keep taking it through the middle third so you enter the run already hydrated.

In T2, focus on getting your feet under you quickly without turning the run into a sprint start. As you rack into the run, do a brief mental reset: settle into your planned pace within the first kilometer rather than reacting to how good you feel off the bike. Your first steps should feel a little heavy—stay tall, shorten the stride slightly if needed, and let the cadence build.

The run is 21.5 km with 9 m elevation gain on a flat/fast profile, so it’s a steady engine test more than a hills test. With air temperatures ranging 14.2–25.9°C and moderate heat, manage your pace to the heat—don’t let early speed outrun your cooling and fueling. The wind (7.2 m/s from the S) can help or hurt depending on where you are relative to it; expect wind-facing sections to feel cooler and more “fast,” while sheltered stretches may feel hotter and require pacing restraint. Keep drinking and eating through the run in line with your planned carbs and sodium strategy (you already set the fueling base on the bike); small, frequent intakes beat trying to recover with one big feed. Use aid stations efficiently—grab, drink, and move—then focus on maintaining rhythm through the final third rather than spiking effort early.