The Endurance, also known as Raid, are competitions of resistance for horses – equivalent to the human marathon – and the competitions can have between 40 and 160 km if carried through in one only day or, being more than one day, will have at the very least 80 km per day.

During the competitions, there will be a certain number of veterinarian controls – of about 40 in 40 km – for the control of the physical conditions of the horse in order that it can continue, without no danger, the competition.

The 160 km of the European Championship "Open" 2007 in Portugal will be covered between Companhia das Lezírias e Barroca D’Alva.