The Wet Andes runs from a latitude of 35°S to Cape Horn at 56°S.

According to Luis Lliboutry the Wet Andes can be classified after the absence of penitentes.

In Argentina well developed penitentes are found as south as on Lanín Volcano (40°S).

[1] Another difference is that the Wet Andes is largely devoid of rock glaciers.

[2] The glaciers of the Wet Andes have a far more stable line of equilibrium than those of the Dry Andes due to summer precipitations, low thermal oscillations and an overall high moisture.