What memorial prize honors the Tour de France founder on the race's highest summit?

The memorial prize honoring Tour de France founder Henri Desgrange is the Souvenir Henri Desgrange. It is awarded to the rider who is first across a designated point, usually the highest or one of the most significant mountain summits on that year’s route.

The prize was created after Desgrange’s death and first awarded in the 1947 Tour, the first edition held after the race’s interruption during the Second World War. Desgrange had created the Tour and served as its first race director, and he was especially associated with pushing the event into difficult mountain terrain.

The Col du Galibier became the prize’s symbolic home. A monument to Desgrange was built near the summit in 1949, and from 1952 onward the monument commonly marked the prize when the Tour crossed the climb. If the Galibier is absent, organizers use another major summit or the highest point reached by the race.

The award is not the same as the Souvenir Jacques Goddet, which honors Desgrange’s successor and is generally associated with the Col du Tourmalet.