El Segundo Buttress, South Face. The first ascent of this striking buttress above Whitney Portal was made March 21 by Michael Heath and me. The route ascends a crack system past a prominent overhang, then continues up incipient cracks on the nose. Several short blank areas between cracks required the placing of 5 bolts and the use of 5 bat-hooks in drilled holes. NCCS III or IV, F7, A3.