The run in Westfriesland: a flat, multi-lap half through Hoorn's old town

The course

The Westfriesland half marathon is completely flat and runs over multiple laps — four in the 2021 edition — through the historic streets of Hoorn. The old-town sections are packed with spectators and, according to race reports, the atmosphere is excellent. The lap format has two practical upsides: you see your supporters several times and you hit aid stations at regular intervals. And one mental downside: you have to manage the temptation to count laps instead of racing.

Flat doesn't mean easy

A course with no elevation change is fast, but it demands a specific skill: holding an even pace without the micro-recoveries that descents give you. Your legs work the same way, with the same movement pattern, for 21 km. If you only train on rolling terrain, add flat long runs at race pace: that's where you find out whether your target pace actually holds up.

Another point: on a flat course, pacing almost always goes wrong in just one way — going out too fast. You come out of T2 with bike-heavy legs and the first lap feels free. It isn't. Set the first lap slightly below goal pace and pick it up from lap two, if the legs are there.

Aid stations: the 2023 precedent

This is the most important takeaway in this article. In 2023, some aid stations ran out of isotonic drink, Red Bull and, at times, even water. We don't know if the problem will repeat, but the lesson is clear: don't bet your race on the organisers. Start with enough of your own gels for the entire half and, if it's a hot day, consider carrying a soft flask. It costs you 100 grams and saves your race if you find an empty table.

The heat factor

The typical climate is mild: average highs of 21 °C in June. But past editions have also seen unusual heat, with historical air temperature swings between 12 and 30 °C. On a flat, partly urban run course, 28-30 °C changes everything. Have a backup cooling strategy: water over your head at every aid station, ice if available, a wet cap. Decide before the race at what temperature you switch from plan A (goal pace) to plan B (conservative pace plus systematic cooling): deciding at km 8 with your heart rate through the roof doesn't work.

Realistic times

Our rough estimates, not official data: around 2:20 for a comfortable finisher, 2:00 for a mid-pack goal, 1:45 for a fast athlete, 1:28 for a top age-grouper. On this course, with kind temperatures and a well-managed bike leg, fast splits are genuinely possible.

What to do now

Four actions. One: in the final eight weeks, do your quality run sessions on flat routes, simulating the absence of terrain-based recovery. Two: test the combination of your own gels plus a flask in training, so you know exactly what you need over 21 km at your pace. Three: do at least one long brick — bike in aero plus a run at race pace — because the transition from 90 flat km in an aero position to a flat run is a muscularly specific demand. Four: on race day, write your first-lap pace on the back of your hand. The Hoorn crowds will push you to run faster: it's brilliant, but the bill comes due on lap three.