Stage 20 of the 2025 Tour de France is a medium mountain stage that will take place on .
The stage starts in Nantua and finishes in Pontarlier, starting at with an expected finish at (average speed of 45 km/h).
The total distance of the stage is 188.4 km. The stage includes 4 categorized climb(s) and 1 intermediate sprint(s), and has a total elevation gain of 2658 m, and a total descent of -2301 m.
The stage includes 4 categorized climb(s) and 1 intermediate sprint(s).
The neutral start for this stage is 4.5 km long with an average gradient of 1.3%.
Col de la Croix de la Serra is a KOM cat. 3 climb, which starts at 12.6 km (171.3 km to go) and ends at 24.7 km (159.3 km to go). It has total distance of 12.1 km, and an average gradient of 4.2%, going from 538 to 1050 meters of altitude.
Côte de Valfin is a KOM cat. 4 climb, which starts at 39.4 km (144.5 km to go) and ends at 45.1 km (138.9 km to go). It has total distance of 5.6 km, and an average gradient of 4.3%, going from 444 to 686 meters of altitude.
Chaux du Dombief is a Sprint at 72.2 km (111.7 km to go).
Côte de Thésy is a KOM cat. 2 climb, which starts at 117.9 km (66 km to go) and ends at 121.5 km (62.4 km to go). It has total distance of 3.6 km, and an average gradient of 9%, going from 361 to 685 meters of altitude.
Côte de Longeville is a KOM cat. 4 climb, which starts at 157.5 km (26.5 km to go) and ends at 159.8 km (24.1 km to go). It has total distance of 2.3 km, and an average gradient of 5.9%, going from 683 to 820 meters of altitude.
The final 3 km for this stage starts at 181 km, has an average gradient of 0.7%, reaching 836 m of altitude.