[6] Purity is an attractive peak surrounded on three sides by névés, with no less than six glaciers radiating from it.

Purity Mountain is more notable for its steep rise above local terrain than for its absolute elevation.

Topographic relief is significant as the summit rises 1,650 m (5,410 ft) above Van Horne Brook in 3 km (1.9 mi).

The mountain was named in August 1890 by Harold Ward Topham of the Alpine Club of England who saw it from Donkin Pass.

[7] The first ascent of the summit was made in 1890 by Harold Ward Topham, Emil Huber, and Henry Forster.