Stage 20 · 25 July 2026

Le Bourg-d'Oisans → Alpe d'Huez

170.9 kmMountain — summit finish

Queen stage of the race — the race's highest point (Col du Galibier, 2,642m) and a back-to-back finish atop Alpe d'Huez.

Observed conditions from the ERA5 reanalysis archive.

Observed heat snapshot

+5.9°Cvs the 1974-2023 average at this location (ERA5): 17.9°C

30.5°Cpeak in the race window

Moderate high-risk · 24°C WBGT (est.)

Schematic — real elevation, approximate route between known points, not survey-accurate. Fill colored by temperature.

+10°C26°C+42°C

Decade trend — deviation from the 50-year mean at this location

16.5°C'74–'83

18.2°C'84–'93

18.0°C'94–'03

17.8°C'04–'13

19.2°C'14–'23

-2°C50-yr avg+2°C

A day this hot (≥23.8°C, ERA5 at this location) occurred 10× in 1974-1983 vs. 20× in 2014-2023.

WBGT is an estimate — see methodology. Data as of 2026-08-01T22:34:20.173Z.