Normally about 100 participants[4] float the Haglund bridge in Uppsala to Islandsfallet in home-built[5] polystyrene rafts.
The River Festival, which takes place during the preceding week, allows participants to build their rafts in the raft-construction area.
During the daytime, there are a number of activities and in the evenings different themed pubs, parties and performances.
The committee is selected once a year and consists of 23 volunteers who are students at the Department of Engineering and Science.
The members of the committee are recognisable by their red tops and black carpenter's trousers with flames licking up their legs.