As noted by the folks at Podium Cafe , the riders make the race much more than the road does, so the

The highest-rated climb of the Tour de France dallas tour 18 awaits on Friday, as Stage 13 will take riders from Saint-Etienne through dallas tour 18 Chamrousse, a distance of 200 kilometers. The first 170km of the stage will be interesting, but the main event is the uphill climb over the final 30km.
The first test will be the category three climb, and then a long section of relatively flat roads before the Col de Palaquit category one climb once riders reach the final 60 km. But it's the final climb up Chamrousse, a full 18.2km at 7.3 percent grade. It's going to be a tough one, and could shake up the race for the yellow jersey.
As noted by the folks at Podium Cafe , the riders make the race much more than the road does, so there will still be plenty of competition throughout dallas tour 18 this climb. It's not just going to be a couple climbers slogging it out on their own, in other words. If there's an attack to be made, it definitely will be.
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