IRONMAN 70.3 Mossel Bay

Get yourself ready for an ocean start: arrive early, check your swim exit/entry points, and take a few minutes to warm up gradually (legs and shoulders) without overexerting. In the first minutes, commit to your seeded position so you aren’t fighting slower swimmers; settle into a calm, repeatable stroke rhythm right away. If it’s crowded, focus on smooth sighting and avoiding lateral surges that waste energy.

You’ll cover 1,996 m in open water at about 20.1°C, and the official wetsuit ruling is set on race morning—confirm via the IRONMAN athlete guide rather than relying on pre-race assumptions. Expect typical ocean chop for comfort and buoyancy, so keep your breathing steady and your line controlled when you’re being buffeted. If wind or current shifts, prioritize staying on your intended sighting line over “chasing” distances—small course corrections now prevent a big time loss later. Fueling during the swim should not be a focus; instead, be ready to transition quickly and take your first bike fluids/carbs as soon as you’re able.

Handle the swim→bike transition with efficiency: keep your run/walk to a minimum, rack cleanly, and get helmet and glasses on immediately so you’re not juggling items while moving. Right after you mount, spend the first few kilometers getting stable—find your cadence, check your hydration setup, and settle into the climbing effort even if you feel eager. Your goal at the start is to avoid spiking power before the hilly sections ramp up.

Ride 87.4 km with 837 m of elevation gain on a hilly/climbing profile, so your pacing has to match the terrain: drive the climbs, then recover on downhills and flatter stretches without blowing up the effort. You’ll have wind around 6.6 m/s from the south; be ready for it to influence your speed on exposed stretches and create more variable effort on climbs—stay composed and use your target power/cadence rather than reacting to speed changes. Fuel consistently: aim for 90 g carbs and 750 mg sodium per hour, plus about 650 ml fluid per hour, spacing intake so you’re absorbing steadily as the course climbs. Because the ride is lumpy, don’t wait until you feel “behind”—start fueling early on the bike and keep it regular through the hills so the run doesn’t start under-fueled.

Plan for the bike→run transition (T2) to feel like a reset: take a short moment to stand tall, breathe, and cue your first steps to be controlled. Off the bike on a hilly/climbing run (21.2 km, 154 m gain), your legs may feel heavy—focus on quick cadence and smooth strides for the first several minutes before you build. If you’ve stayed steady on the bike, your job on the run is to keep effort repeatable over the climbs rather than sprinting the first downhill.

Run 21.2 km with 154 m of elevation gain on a rolling/hilly course, where small surges on descents can cost you later on the next lift. With moderate heat (air temps roughly 14.6–21.6°C), you still need to manage effort: aim for a pace you can hold through repeated climbs without turning them into all-out efforts. Wind can still affect comfort on exposed sections, so keep your breathing calm and don’t let crosswinds push your rhythm around. For fueling, use the nutrition plan you practiced—during the run continue targeting your race fueling rhythm so you’re not dependent on “feeling good” to take carbs and fluids.