Rocky Ak-Su, Various Ascents. It was reported that this peak in the Laylak Valley was climbed from July 12 to August 6, 1995. The north summit is rocky (Rocky Ak-Su, 5217 m), and the principal summit in back is extremely snowy (Snowy Ak-Su, 5355 m). The north face is the highest, and without doubt the most difficult of the Turkestan chain. A. Plyanzin and A. Ruchkin repeated the Mashnikov route (third ascent) and also the Chaplinsky route (second ascent). (GHM 1995-1996).