IRONMAN 70.3 Erkner
Sunday, 13 September 2026
IRONMAN 70.3 Erkner is a fast, mostly flat course where steady power on the 88.6 km bike and consistent fueling carry you through a 21.6 km run in moderate conditions with a light-to-moderate W wind.
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 →Arrive with plenty of time to find your entry point, check your swim lane/seeding, and do a quick body-and-shoulder warm-up so your first strokes feel smooth. Start conservatively in the first minutes—settle into a pace you can hold comfortably for the full 1,876 m without burning matches. If you’re between groups, bias slightly calmer positioning early; you can always move up once everyone stretches out.
You’ll swim 1,876 m of freshwater where the temperature varies, so your goal is smooth, efficient form rather than a hard early effort. With variable freshwater conditions and changing packs, sighting and staying relaxed matter—avoid sprinting to bridge gaps and instead find rhythm. Focus on an even breathing cadence; if the wind and shoreline chop affect your sighting, widen your stroke count slightly to keep balance and reduce extra kicks. Fueling during the swim is typically minimal—concentrate on hydration and then be ready to execute your planned intake immediately after the bike.
Finish the swim calm and controlled, prioritize getting your body centered for the transition, and move quickly through the “drying + gear + shoes” steps so you don’t lose rhythm in T1.
Transition flow: get off the swim fully moving, rack quickly, and make T1 efficient—hat/gear on, helmet secured, shoes on, and bottles filled/checked in a clean sequence. As you mount, settle into a stable cadence right away; the flat/fast profile means it’s easy to overshoot early, especially with fresh legs. Before you pick up speed, confirm your planned gearing and that your nutrition setup is reachable without fumbling.
Ride 88.6 km with 100 m of elevation gain on a flat/fast profile—this is a course where pacing is everything. The wind is about 5.1 m/s from the W, so expect it to feel more “present” on sections running into it and flatter when sheltered; don’t spike power when the wind increases—hold steady effort and let speed fluctuate. Aim to match your fueling target through the bike: 90 g carbs per hour, 750 mg sodium per hour, and about 650 ml fluid per hour. Take it regularly rather than in big hits—use consistent bottle sips and plan your stomach for moderate heat. Because the course is fast, avoid going too hard early; save enough for the run by keeping power controlled, especially in the first portion of the ride.
When you’re within range of T2, start to shift your mindset from “speed” to “run readiness”: stay smooth in the saddle, secure your last drinks, and ensure you can dismount without rushing your lower-body mechanics.
Transition flow (T2): off the bike, take a few controlled steps to settle your balance, then lock into a steady cadence immediately. The first 1–2 minutes are about finding leg comfort—your goal is to feel smooth, not powerful. If your legs feel heavy, don’t chase intensity early; keep effort controlled while your stride and breathing synchronize.
Run 21.6 km on a flat/fast profile with 39 m elevation gain—this course rewards even pacing and disciplined fueling. With moderate heat and a W wind, you may feel more exposed at times, so manage effort rather than reacting to speed changes. Use your planned intake consistently; aim for the same “on-time” fueling approach you used on the bike so your stomach stays predictable as the run extends. The key is to keep your cadence steady and let the flat terrain do the work—small surges tend to cost more later on a long, mostly flat run. If you catch someone, pass cleanly without accelerating beyond what you can hold for the full distance.
Your final takeaway is to keep effort controlled through the middle so the last third is about execution—hold form, keep sipping/fueling on schedule, and finish strong rather than sprinting early.
Plan for a steady, repeatable effort: hold back slightly into wind, stay consistent with 90 g carbs/h, 750 mg sodium/h, and ~650 ml fluid/h on the bike, and don’t let flat/fast speed tempt you into early overload.
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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.