North Face Icefield or Powell Peak Icefield is the wide snowfield west of Powell Peak and Vanquished Buttress, above Sky Pond in Loch Vale. A stellar alpine ice route, it is best climbed in mid- to late summer when the snow has slid and hard gray alpine ice is revealed. A number of variations are possible, the most consistent ice and steepest line is to the right of the rock rib high on the route. When we climbed it, enough melting had occured that there was some steep slush/ice mix and a little mixed climbing to get into the right side of the route. It is definitely worth it for 200+' of perfect ice.
Ice screws and a few nuts might be helpful when this route is "in" and if you choose to rope up.