On a Monday in mid-July short track harness races are held on the grass track behind the church in Stompwijk. They are races for 24 horses and the finish is at minimum 968 and maximum 1017 feet. The horses in this competition pull a light cart, a sulky, and trot as fast as they can. There is a driver in the sulky. The horses trot in pairs against each other, alternately in the inner and the outer track. The horse that wins the first two rides, qualifies for the next round. Through a knock-out system four fast trotters remain, that run for the first up to the fourth prize. The short track regulations of the Dutch Harnessing and Racing Sports Foundation are applicable. The short track harness races are the highlight and the closing event of the Stompwijk Horse Days. On Friday there is a parade with horses and ring tilting. On Saturday there is a show jumping competition and on Sunday the National Pony Races are held. During the Horse Days there is a fair in Stompwijk. There are a lot of other activities, for young people, like shows in the party tent, disco, quad biking and tonknuppelen (barrel beating) and for the elderly (card games).