When cyclists reach the French commune of Béon, they will have biked for 130.5 km (81.09 miles) and be at an elevation of 255 m (837 feet). Today's day of rest will come in handy because they will then need to ascend to Col du Grand Colombier, which is at an elevation of 1501 m (4925 feet). That 1246 m (4088 feet) change in elevation happens after just 21.0 km (13.0 miles) of cycling. That's quite a climb! Drawing a right triangle with a hypotenuse of 21.0 km and a vertical side of 1.246 km gives an angle of 3.4 degrees opposite that 1.246-km side. That works great as an average, but cyclists won't traverse the average. They must traverse the final 17.4 km (10.8 miles) of that 21.0 km on a 7.1% climb.
Upon reaching the peak of Col du Grand Colombier, cyclists will still have 43.0 km (26.7 miles) left, including a Category 3 climb in the middle of that stretch. To state the obvious, Stage 10 will be quite a challenge for this year's Tour de France competitors. Below is our prediction.
- Stage 10: 5h 09' 49" (prediction)
The challenge for us as we predict a stage with such a brutal climb is determining what power cyclists will be able to output during their ascent. If the climb proves to be too intense, our prediction will be too fast. We want to see the world's best dominate Col du Grand Colombier!