The rafting takes place on 30 April every year,
Walpurgis Night. Normally about 100 participants float the Haglund bridge in Uppsala to Islandsfallet in home-built
polystyrene rafts. Tens of thousands of specatators watch the event. The prizes are awarded by the principal of the university, the
Rector Magnificus. A few of the rafts represent different organizations but the vast majority of the participants are students at the
University of Uppsala or other universities. == The River Festival ==