TRI AMSTERDAM: Course, Route Profile & Map

Course & Elevation

The day starts at eight o'clock in the river. The swim sets off at the Berlagebrug in the middle of the business district, runs past the houseboats to just beyond the Utrechtsebrug and back, as a rolling start with one athlete entering the water per second rather than a mass start. Out of the water you go into transition at Park Somerlust, and from there leave the city towards Ouderkerk aan de Amstel.

At 90 kilometres the bike is the long part of the day: an approach leg and then two laps of the 42 km Amstelland circuit, past the Ouderkerkerplas, Fort Abcoude, the village church of Abcoude, Loenersloot Castle and the Oukoper windmill, with long straight sections along the Amsterdam-Rijnkanaal. The half marathon then brings you back to the Amstel over four laps and into the finish chute at Bella Vista Park.

The effort is distributed differently from a half-distance race with mountains. No climb forces you to change pace and no descent lets you recover. For close to five hours you sit or run in the same position, and the only interruptions are the transitions and the wind direction.

Pacing Strategy

The race is decided on the bike, though not where it feels like it. Over open polder the first lap rides itself, because the course is flat and the field is still together. That is exactly why power, not speed, is your yardstick: on a 42 km lap ridden twice, every straight gives you a tailwind once and a headwind once, and anyone who calibrates on the tailwind section pays for the second lap.

The swim start is the second place time disappears, but differently from usual. The rolling start takes the panic out of the beginning while asking you to find your own pace without a pack. Swim the first two hundred metres deliberately controlled, or you begin a race with an oxygen debt and no climb anywhere on which to settle it.

The classic trap is the move from bike into half marathon. After 90 flat kilometres in the aero position, hip flexors and lower back are the limiting structures rather than the legs, and the run offers no hill to force the change of rhythm for you. Plan the first running kilometre deliberately slower than goal pace, and expect your drinking on the bike to decide the second half of the run.

Training plan for TRI AMSTERDAM: 12-week build

For an age-group athlete this half distance takes roughly four and a half to six and a half hours; the 2026 winning times were a good 4:14 for the men and 4:47 for the women. The demand is evenly aerobic across the whole duration, with no anaerobic spikes but equally none of the recovery windows a hilly course supplies for free.

The second bike lap and the transition that follows it decide the race, and that exact combination belongs in training: long rides of three to four hours at constant power in the aero position, the final part deliberately into the wind, followed by a brick run of 45 to 75 minutes. Without those sessions you are training three disciplines rather than this race.

Conditions are a training discipline of their own here. The wind over the Amstelland and the Amsterdam-Rijnkanaal is the real resistance of the day, and the quays in the finish area give no shade. Ride deliberately in wind, practise holding the aero position for hours rather than for intervals, and get used to working in midday June heat. The swim is a river swim: open water with sighting off bridges and banks, possibly in a wetsuit, needs rehearsing too.

That leaves the trunk. Ninety flat kilometres in the aero position followed by 21 kilometres with no change of terrain load the same structures throughout. Core and hip stability plus hip flexor mobility are not an add-on for this course; they are the reason the last seven kilometres of the run hold together or do not.