Joie de Vivre Buttress

From the upper Joie de Vivre Glacier, climb the rock buttress directly to the summit.
The feasibility of direct access from the Classen to the Joie de Vivre is unknown. It may be easier to either start further down valley, using slopes below the north ridge of Mt Sydney King, or drop onto the upper Joie de Vivre Glacier from near the summit of Phyllis.
A NZMGA guides course added a number of routes on this buttress in March 1991.