Francisco Cepeda
Died – Stage 8 Tour de France – 12.07.1935
The first rider to die whilst racing a Tour stage, Cepeda crashed descending the Col du Galibier on Stage 8 from Grenoble to Gap, plunging off a ravine and fracturing his skull.. Reports vary as to whether he died on the way to hospital or a couple of days later.
The Massif Central Blog 