At the confluence of Durance and Guil rivers, overlooking the impressive canyon of the latter flowing down from Queyras valley, Mont-Dauphin is one of the many places fortified by Vauban in the second half of the 17th century.
The village lies in the Queyras, in the northwestern part of the commune, on the left bank of the Guil, which has its source in the southeastern part of the commune.