As the leading riders climb out of bed, flex their Pyrenees and start mountain their bikes, it will be in the knowledge that today the Tour starts in earnest.
The ride from Toulouse to Bagneres-de-Bigorre is not only long - at 224km - it also has no fewer than seven climbs, including two first-categories in the last 60km; the Col de Peyresourde (1569m) and the Col d'Aspin (1489m).
A week ago the weather in the Pyrenees for l'Etape du Tour was awful - fog, rain and temperatures down to 2 degrees atop the Tourmalet.
And today's forecast isn't much better - 10 degrees and cloudy on both big climbs, with 100% humidity, and raining at the downhill finish into Bagneres-de-Bigorre.
It's a day for the climbers and for those with serious aspirations to the yellow jersey.
Mark Cavendish and the other speed kings will be hoping simply to get through it.
While keeping an eye out for David De La Fuente, Sylvain Chavanel and Thomas Voeckler contesting the King of the Mountains competition, the real action should involve Alejandro Valverde and his Caisse d'Epargne team attempting to draw out the Australian lurker, Cadel Evans.
But don't overlook Denis Menchov, Kim Kirchen and the wildcard of the Tour so far, Stefan Schumacher.