The day began with a breakaway of nine riders at around the mark and consisted of the following riders: Jens Voigt (RadioShack-Leopard), Arnold Jeannesson (FDJ.fr), Christophe Riblon (Ag2r-La Mondiale), Andrey Amador (Movistar Team), Sylvain Chavanel (Omega Pharma-Quick-Step), Lars Boom (Belkin Pro Cycling), Tom Danielson (Garmin-Sharp), Tejay van Garderen (BMC Racing Team), and Moreno Moser (Cannondale). By the mark, they had extended their advantage over the peloton to 5' 40. Van Garderen would attack his leading companions at the foot of the first ascent of Alpe d'Huez, with only Moser and Riblon able to keep pace and caught up with him away from the top of the climb. Despite multiple mishaps - van Garderen's chain fell on the descent of the Sarenne and Riblon went off the road - the three leaders were firmly in the lead at the base of the second climb of Alpe d'Huez. Once again, van Garderen attacked at the base of the climb and quickly distanced himself from his leading companions. Riblon, despite being down 40 seconds to van Garderen at one point, would claw his way back up and passed him with to go, and ultimately won the only stage by a French rider in the 2013 Tour.