Start on Tuckerman Ravine Trail and break off at the Huntington fire road. Proceed to the Harvard Cabin and then continue on the fire road to the bottom of Huntington Ravine. Ascend the fan towards the prominent diagonal line lookers right of central. This is obscured from sight. Either climb the Harvard ice bulge or work through the bottom section of Yale and traverse left into the bottom of Diagonal Gully. Stick hikers right and allow a great distance between people. There are very few safe zones on the ascent and descent. The gully tops out in the Alpine Garden.
The Gully ranges from 10-30 feet wide and averages approximately 45 degrees. Slough management can be difficult due to the lack of safe zones. It is best to keep your slough in front of you on this line. Use extra caution when approaching the Harvard Ice Bulge as a fall here can result in injury or death. The bulge is between 30-45 vertical feet depending on the season.