Due to the difficult weather conditions expected on stage 20 and landslides noticed, the course has been modified. After taking off from Albertville, the race will use the N90 road to head directly to Moutiers to reach the planned route at the N90-D915 roundabout 36km from the finish. The start will be given in Albertville at 14.30 for a total distance of 59km. The KOM prize at the finish in Val Thorens remains.
https://www.letour.fr/en/news/2019/stage-20-shorten-to-59km/1282785
Got to be good news for Bernal - just one climb on which anyone can try and pull pack time. He'll be able to put everything into it too.
A hailstorm and a landslide forced the race jury and organisers to stop the 19th stage with the extreme weather conditions having damaged other roads. The peloton will now go straight from Albertville to the final 33km ascent to Val Thorens and the riders will not have to tackle the category two Côte de Longefoy or the category one Cormet de Roselend, a 19.9km ascent at 6%.
The changes hand the new overall leader, Egan Bernal, a significant advantage, dramatically reducing the opportunities for his rivals to mount an attack.
https://www.theguardian.com/sport/2019/jul/26/landslides-tour-de-france-cut-stage-short