The Col de Portet d'Aspet (elevation 1,069 metres (3,507 ft)) is a mountain pass in the central Pyrenees in the department of Haute-Garonne in France.

It is situated on the D618 road between Aspet and Saint-Girons and connects the Ger and Bouigane valleys, on the slopes of the Pic de Paloumère (1,608 metres (5,276 ft)).

In the 1973 tour Raymond Poulidor almost died on the descent from the Portet d'Aspet when he plunged off the road into a ravine, taking a serious blow to the head and crawling out with the help of the race director, Jacques Goddet.

While being transported via helicopter to a local hospital, he stopped breathing and after numerous resuscitation attempts was declared dead.

The Société du Tour de France and the Motorola team placed a memorial stone dedication to Casartelli on the spot where he crashed.