The mountain achieved worldwide notoriety when it claimed the life of British cyclist Tom Simpson , who died here on July 13 , 1967 from heat exhaustion caused by a combination of factors , including dehydration ( caused by lack of fluid intake and diarrhea ) , amphetamines , and alcohol , although there is still speculation as to the exact cause of his death .
British cyclist Tom Simpson , who died here on July 13 , 1967 from a combination of amphetamines , alcohol and heat exhaustion .