Whitewater Canoeing: The whitewater canoes, as well as their larger relatives, the 4-10 person rafts boats, specially developed and made by heavy-duty rubber. In these boats are able to paddle 2-3 people in the same time. The golden rule is that the canoes have to be always faster than the current of the river. The person who sits back is the cox, and the others give the speed to the boat. The canoe trip is usually two days long, and 3-4 tour guides lead about 20-25 people on the river. Everyone is able to learn how to control the boat during the first and easier day, so the next day they can easily take the more difficult rapids.