After a rest day, the riders took in the Tour's hardest stage, and the last chance for the climbers to make the time gains they’d need before the final time trial. The race was thought to split up somewhat on the brutal Port de Larrau (14.7 km climb at 8.1%), despite the fact that its summit came just 79 km into the stage. The race dipped into Spain for some 50 kilometres at the summit, the fourth country visited in this year's Tour. From there, there was little reprieve for the riders, hitting the Alto Laza and the Col de la Pierre St Martin (14.2 km climb at 5.2%) before descending to the start of the difficult, and very steep, first-category Col de Marie-Blanque (9.3 km climb at 7.4%). The riders then climbed the infamous Col d'Aubisque (16.7 km climb at 7%), which rewarded out-and-out climbing ability and punish the legs of all the major contenders.