Col de Clapier (French Col du Clapier, Italian Colle Clapier) is a 2,491 m (8,173 ft) high mountain pass over the mountain massif Mont Cenis in the Cottian Alps and Graian Alps between Savoy in France and Piemont in Italy. The bridle path goes from Bramans (1220 m) to Susa (503 m). There is no firm road.
The Col du Clapier is considered a possible route for Hannibal's famous passage through the Alps on his journey from the Rhone (in French, Rhône) river valley to Italy. From 2004-2008, Patrick Hunt, a scholar from the Stanford University (USA), has lead numerous archaeological expeditions through the Col du Clapier to research the possibility and likelihood of Hannibal using this pass to traverse the Alps with his army.
Hunt's research has involved topographical surveys, soil and rock sampling, exploration of the Col du Clapier's various modern and historic routes, and comparisons of Polybius' and Livy's accounts of Hannibal's passage to the regional and local geography. In 1959, it was the planned route of the British Alpine Hannibal Expedition, however, due to rockfall, the expedition backtracked and took their elephant into Susa via the Col du Mont Cenis.