Rivière was one of 14 riding for France in 1960. It was his second participation and he had become one of the favourites. But his talent made him careless with training and what he ate. Rivière followed Nencini wherever he went. He had only to hold him until the final time-trial and beat him by 1m 38s to win the Tour. On the zig-zags of the col de Perjuret, Nencini passed fourth with Rivière behind him. Nencini was known as the fastest descender in the world, famous for his dangerous and risky trajectories, and Rivière tried to follow him. He hit a low wall soon after the start of the descent and fell over it, rolling down the slope. A team-mate, Louis Rostollan, raised his hand to call the team manager,
Marcel Bidot. He, journalists and officials found Rostollan peering into the ravine. Rivière's bike was nearby, its forks pushed back and its frame twisted. Rivière had broken his back. A helicopter took him to hospital in
Montpellier.
Antoine Blondin wrote: :On a bend, we saw a rider, the tall Rostollan, making demented gestures and running back up the hill and shouting 'Roger has fallen! Roger has fallen!' It was impossible to stop on the gravelled toboggan on which we'd embarked. Nobody had seen Rivière disappear. For five minutes, we thought he had been vaporised, purely and simply crossed off the map of the world, of which the immense and chaotic landscape around us gave the scale. Well, he was lying 20 or so metres below with a broken spine that forbade him the slightest gesture, the least call. His head was resting on a bed of rocks, his eyes open to the mountainous (
rugueuse) countryside that surrounded him. :When we managed to stop in the hamlet of Vanels to collect our breath, we still didn't know exactly what had happened, but anxiety showed on the faces of all who passed us. One by one, face after face, the event was written there... Finally, Radio Tour announced: 'Roger Rivière has been the victim of a serious accident'... The helicopter, which couldn't land on the steep slope where Rivière had ended up after his fall, turned above us in the way that vultures circle. Doctors found pain-killers in Rivière's pockets and more in his body. Rivière nevertheless blamed his mechanic, saying his brakes were faulty. "I pulled them on but they didn't work." The brakes were examined and found to be faultless. He then said there was oil on his rims. He withdrew the accusation in face of criticism. He later sold the story of his drug use to a newspaper, admitting he had taken
Palfium during the climb of the Perjuret, a painkiller that could have affected his reflexes and judgment. In 1961,
Miroir du Cyclisme republished an article originally written for
Libre Santé by Rivière's friend and dietician, Clarisse Brobecker. She confirmed the theory that Rivière was so numbed by painkillers that he either hadn't attempted to pull on the brakes or had been unable to. Rivière admitted taking
amphetamines and solucamphor during his hour record in 1958 – including tablets during the attempt. He said he had an injection of solucamphor and amphetamine before the start and swallowed several amphetamine tablets. ==Retirement and death==