{"document_url": "https://en.wikipedia.org/wiki/2013_Tour_de_France,_Stage_12_to_Stage_21"}
The 2013 Tour de France was the 100th Tour de France. It ran from 29 June 2013 to 21 July 2013, starting in the city of Porto-Vecchio in Corsica.

Stage 12
11 July 2013 — Fougères to Tours, 218 km (135.5 mi)
Stage 13

12 July 2013 — Tours to Saint-Amand-Montrond, 173 km (107.5 mi)
The 13th stage saw a big change in the general classification due to crosswinds leading to the formation of echelons. A 15-man group led by Alberto Contador's Team Saxo Bank, with the help of eventual stage winner Mark Cavendish's Omega Pharma–Quick-Step and Bauke Mollema's Belkin Pro Cycling used the crosswinds to make a gap with other General Classification riders 31 kilometers from the finish to form the echelons. Then again This helped Contador gain 1'09" on – among others – Chris Froome, Nairo Quintana and Joaquim Rodríguez. The biggest victim however was the number 2 in the General Classification at that point: Alejandro Valverde. He lost 9'54" after having a puncture at a critical point in the race. The stage saw escapees Bauke Mollema move to second, Alberto Contador to third, Roman Kreuziger to fourth, Laurens ten Dam to fifth and Jakob Fuglsang to sixth in the General Classification. Chris Froome retained the yellow jersey, while Alejandro Valverde dropped to 16th.
Stage 14
13 July 2013 — Saint-Pourçain-sur-Sioule to Lyon, 191 km (118.7 mi)
Stage 15

14 July 2013 — Givors to Mont Ventoux, 242.5 km (150.7 mi)
Stage 16

16 July 2013 — Vaison-la-Romaine to Gap, 168 km (104.4 mi)
Stage 17

17 July 2013 — Embrun to Chorges, 32 km (19.9 mi), individual time trial (ITT)
Stage 18

18 July 2013 — Gap to Alpe d'Huez, 172.5 km (107.2 mi)
The queen stage of the 2013 Tour de France saw the riders contest six categorised climbs on the day: the Col de Manse, the Rampe du Motty, the Col d'Ormon, the first ascent of the Alpe d'Huez, the Col de Sarenne, and finally a second ascent up Alpe d'Huez.

The day began with a breakaway of nine riders at around the 17 km (10.6 mi) 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 35 km (21.7 mi) 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 1 km (0.6 mi) 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 2.4 km (1.5 mi) to go, and ultimately won the only stage by a French rider in the 2013 Tour.

Back in the peloton, major changes were occurring in the general classification. Belkin Pro Cycling riders Bauke Mollema and Laurens ten Dam both cracked at the beginning of the climb and slid a couple of places on the leaderboard. Nairo Quintana (Movistar Team) attacked the group and was followed closely by Team Sky's Chris Froome and Richie Porte as well as Team Katusha's Joaquim Rodríguez. The Saxo–Tinkoff trio of Alberto Contador, Roman Kreuziger, and Michael Rogers were unable to follow and would lose significant amounts of time. With 5 km (3.1 mi) to go, Froome and Porte would lose contact with Quintana and Rodríguez; at which point Porte dropped back to the team car to illegally get energy gels for his leader, then paced him to the end of the climb to limit his losses to Quintana and Rodríguez. Porte and Froome each received a 20-second time penalty and a fine of 200 Swiss francs for the infringement.
Stage 19
19 July 2013 — Le Bourg-d'Oisans to Le Grand-Bornand, 204.5 km (127.1 mi)
Stage 20
20 July 2013 — Annecy to Mont Semnoz, 125 km (77.7 mi)
Stage 21

21 July 2013 — Versailles to Paris, 133.5 km (83.0 mi)