Since Moixeró is considered older than the Cadí range (it formed during the Variscan orogeny during the Paleozoic era), it is considered the start of the axial Pyrenees, beginning at the Pass of Pendís (1,760 m). From there, it continues to Tosa d'Alp and Puigllançada, to beyond the Pas of Toses. Along with the adjacent ranges, it divides the watersheds of the Llobregat and Segre rivers.