A Two-Lap Marathon on the Zeedijk: Flat, Exposed, Mental

The course in a nutshell

The full-distance marathon is announced as 2 laps with just 40 m of total elevation gain: officially a flat profile. The 70.3 course, which is the basis for almost everything we know, runs along the beach, the Zeedijk (the seawall promenade) and Generaal Willemspark, finishing on the North Sea seafront. If the full keeps this layout — to be confirmed with the official map — you'll be running a scenic, flat and very exposed marathon.

The wind factor, even on the run

A seafront finish means exposed sections and a possible headwind in one direction. Over two laps, that turns the race into "sectors": stretches where the pace comes easy and stretches where the same metabolic effort costs you an extra 10-15 seconds per km. The rule is the same as on the bike: run by effort, not by pace. If your GPS says you're slowing down in the headwind section but your legs and breathing feel right, that's fine. Anyone who chases their target pace into the wind on lap one will be walking on lap two.

Pacing on a course with no excuses

Rough estimates for this race put the marathon between 3:15 and 5:15 depending on your level. On a flat course there are no climbs to mask a slowdown or descents that hand you recovery: every kilometer costs the same, and the bill from the bike leg arrives right on time between km 25 and 32. A concrete plan:

• First 10 km: conservative by definition. Start 10-15 seconds per km slower than your target. On a flat course, post-T2 euphoria is the most common mistake.
• Km 10-30: goal pace, mind on the aid stations. Mentally breaking up a two-lap course helps: don't think "30 km to go," think about the next landmark on the Zeedijk.
• Final 12 km: this is where it's all decided. If you paced the bike and the first half right, the flat second lap is where you pick off athletes by the dozen.

Your head over two laps

A flat, repetitive two-lap course is a mental test before it's a physical one. Passing the same spots a second time can weigh on you. The upside, noted in several race reports from the 70.3 editions: the local crowd along the dike is warm and present, and over the full distance, a seafront packed with people twice over is worth gold. Use the hot spots of crowd support as mental anchors and break each lap into 3-5 km segments.

Weather and aid stations

Typical air temperature 16-21 °C in early September: near-ideal running conditions, far from the heat that wrecks southern European IRONMAN marathons. But beware: cool doesn't mean you can neglect hydration, and a windy seafront dries you out and dehydrates you without you noticing. The aid station details for the full haven't been published yet: check the athlete guide when it comes out.

What to do now

1. Include wind-exposed sections in your long runs and learn to run at constant effort with variable pace. 2. Train the mental side of repetition: do long runs on short loops or repeated routes, not always on fresh ground. 3. Write out a pacing plan by marathon thirds, with a pre-accepted "headwind" pace, so on race day it won't feel like a defeat.