The climb to Luz-Ardiden reminds of that to Alp d'Huez.
Both climbs are steep with the first half being steeper
than the second half and both end at a ski resort.
Both have been the finish location of many Tour de France stages
though the frequency is less for Luz-Ardiden than for Alp d'Huez
(8 against 18 during 1985-2011).
Also, in other aspects Luz-Ardiden is less than its
counterpart in the Alps.
There are far fewer cyclists and cars
and Luz-Ardiden has fewer elevation meters, though only 86.
As mentioned, the steepest part of the ascent (8-11%)
lies in the first half.
It starts just before the village of Sazos and
includes the stretch with 8 hairpin bends
before and after the village of Grust.
In the upper part the forests give way to a more open landscape.
Note that with less than 2 kilometers to go,
one has to turn sharply to the left in the direction of Aulian.
I have no idea about the panoramas and the ski lifts
that must be visible during the final part.
A dense fog inhibited to see anything but the nearest 20 meters.