The short track harness race Assendelft is the first short track of the year, so in Assendelft many horses participate in a short track race for the first time. The new horses provide an extra element of surprise in the rankings, which distinguishes the short track harness race Assendelft from the other races. The trotting is held on a Saturday in early May or late April, depending on such things as King's Day and the Grand Prix in Zandvoort.
The volunteers of the Harddraverijvereniging Assendelft (Assendelft Harness Race Association) meet on Friday to make preparations, programs are prepared, the installations are made ready, and the village flags are hung on the lampposts. The residents of Assendelft also put out flags and decorate their front yards as a terrace to experience the short track race with friends.
On the day of the race, the board and volunteers meet in the morning and the track is laid out in the Dorpsstraat by a ground contractor under the supervision of the track committee. From 11 am, the first trailers enter the grounds, and the teams of sulky drivers are welcomed by the board and the stable manager of the NDR. The start of the race is always at 1.30 pm. During the race, the square next to Het Wapen van Assendelft is filled with many spectators. The garden of the opposite church is also used, there is a bouncy castle for the kids and the parents can watch the harness race in the garden. The finish line is between 'the church and the pub'.
After the race, the prize-giving will be held in Het Wapen van Assendelft. The aim is to have the prize-giving ceremony done by the municipality, this can be the mayor or the alderman of sport. During the race, spectators can place their bets at the betting office on the square near the finish. Throughout the day, a vet and a farrier are present to ensure the safety and health of the horses. The Short Track League has laid down high quality standards that the harness race must meet.