The highest point on Devon Island is found at the summit of the ice cap, with an elevation of 1,921 m (6,302 ft).

The ice cap has a maximum thickness of 880 m (2,887 ft),[2] and has been steadily shrinking since 1985.

[3] The first ascent of the Devon Ice Cap was by Alfred Herbert Joy and his Inuit companions in 1926.

[4] Beneath the ice, two hypersaline subglacial lakes have been identified via RES in bedrock troughs.

[5] Subglacial valleys have also been found, and such structures are thought to control the outflow of ice.