La Sfida on Sunday (28 km) in free technique starts from the Zuoz cross-country skiing center and runs along the Engadin La Diagonela and Engadin Skimarathon route to the finish in Silvaplana. Participants can combine their times for the skiathlon classification if they also take part in La Pachifica (25 km classic) on Saturday. Ideal preparation for the Engadin Skimarathon - this time in the opposite direction.