The Challenge of the EPF reunites since 27 years in a sportive and brotherly spirit more than 400 students issued from both Swiss Federal Institutes of Technology : EPFL (Ecole Polytechnique Fédérale de Lausanne) and ETHZ (Eidgenössische Technische Hochschule Zürich). The participants are selected during various events organized within the two schools, based on their sports performances as well as their socials skills and their fraternal spirit. 50 students for ETH Zurich and 50 students from EPF Lausanne are then gathered in a reserved ski station and fight during 4 days with a strong rhythm. Supported by more than 300 ex-participants, alumni, professors and sponsors, the Challengers engage in ski slalom, boarder-cross, and take part into numerous jovial challenges in order to win the maximum number of points for their school. At the end of the week-end, the famous trophy of the EPF Challenge is given to the institute having won the most points.