In the Netherlands the best known Head race is the Head of the River Amstel every year in March. Another, less well known Head race is the Eemhead, on the river Eem, which is rowed upstream the river and finishes at the boathouse of the organizing boat club, Hemus in Amersfoort. An indoor rower race inspired on the Head of the river Amstel is the Ergohead, organized every year in January by the Amsterdam boat club 'De Amstel'. Initially it was a race over 6 virtual kilometers, and from the second time it was a race during 20 minutes, and the winner is the competitor who 'rowed' the longest distance.