The Col d'Aspin is part of the chain of cols
that connect valleys on the French side of the Pyrenees,
namely from west to east
the Aubisque, the Tourmalet, l'Aspin and the Peyresourde.
As a consequence the Col d'Aspin has very frequently (71 times until 2015)
been part of the Tour de France.
Its western side is a very friendly one.
The climb starts in the centre of Ste-Marie-Campan,
at the same place where the ascent of the Tourmalet from the east begins.
The first 8 kilometers up to Espiadet are not very interesting.
They bridge the first 250 elevation meters with a mean slope of
some 4% through the valley of Le Adour de Payolle.
However, the final 5 kilometers are really nice.
The road enters into the forest, narrows and becomes tranquil.
The slope is steep but still pleasant (7-8 %),
the asphalt is perfect, there are some nice hairpin turns
and here and there openings between the trees
allow views on the surroundings mountains.
Also, the number of elevation meters of this final part
remains friendly with about 400 meters.
Another asset of this tour is the reward at the col
with panoramic views backwards and in southward directions.