On this side lies the culminating summit of the range, the doubleheaded Byelukha (the Mont Blanc of the Altai), whose summits reach 14,890 and 14,560 ft.
The Katun valley begins as a wild gorge on the south-west slope of Byelukha; then, after a big bend, the river (400 m.
The valley of the Bukhtarma, which has a length of 200 m., also has its origin at the foot of the Byelukha and the Kuitun peaks, and as it falls some 5000 ft.
Byelukha at 14,800 ft., but to Willer's Peak, a little to the N.
Of Byelukha, he assigns an altitude of 17,800 ft.