Start, finish: Stage 4. Thun - Altdorf
Race Type: Mountain stage
Distance: 134.4 km
Date: 16 June 1948
During this stage Belgian Richard Depoorter has a fatal accident in the tunnel of the Sustempass. Afterwards, his team, Mondia, withdraws from the race (Remue, Ockers, Impanis, Callens, Van Dijck, Depoorter, Knecht, Stettler, Meier and Lanz).