The Mail Barrat glacier was located between the peak of the same name (2,986 m) and Pico Boum (3,006 m). In the mid-1980s, the western edge of the ice maintained a small connection with the Boum Glacier.
From the moraine accumulations of the Little Ice Age, it is estimated that the length of its tongue reached 675 m at the base, parallel to the buttress connecting the summit of Mail Barrat with Pico Graoués. The orography of this enclave allowed its joint head to reach a width of 900 m, the third largest of the Pyrenean glaciers. In 2012, it became a residual glacier and its last remains disappeared in 2020.
Este aparato glaciar pertenece al siguiente macizo: