Ultar Sar (also Ultar, Ultar II, Bojohagur Duanasir II) is the southeasternmost major peak of the Batura Muztagh, a subrange of the Karakoram range. It lies about 10 km (6 miles) northeast of the Karimabad, a town on the Karakoram Highway in the Hunza Valley, part of the Gilgit District of the Northern Areas of Pakistan.

Notable Features and Climbing History

While not one of the highest peaks of the Karakoram, Ultar Sar is notable for its dramatic rise above local terrain. Its south flank rises over 5,300 metres (17,388 feet) above the Hunza River near Karimabad, in only about 10 km (6 miles) of horizontal distance. Combined with its strategic position at the end of the Batura Muztagh, with the Hunza River bending around it, this makes Ultar a visually striking peak.

Ultar Sar also gained fame in the 1990s as supposedly the world's highest unclimbed independent peak. This was incorrect, as Gangkhar Puensum in Bhutan is higher, and remains unclimbed (and off-limits) in 2006. (Two other higher peaks are also reputedly unclimbed and of independent stature.) However that perception did add to the appeal of the peak, and a number of expeditions attempted to climb it. During the 1980s and 1990s over 15 expeditions made attempts, resulting in no success, but in a number of fatalities; the peak proved to be quite difficult.

The first two ascents were made in July 1996 by two separate Japanese expeditions, the first led by Akito Yamazaki (who summitted, but died on the descent) and the second led by Ken Takahashi. The second summit team comprised Takahashi and four others: Masayuki Ando, Ryushi Hoshino, Waturu Saito, and Nobuo Tsutsumi. The first team ascended from the southwest, while the second climbed the south ridge. Since that time, there have been no recorded ascents of the peak.

Nearby Summits and Glaciers

Ultar Sar is the east end of a short, somewhat level ridge, the west end of which is a peak called Bojahagur Duanasir (7,329 m/24,045 ft), climbed in 1984 by a Japanese party. To the northwest of both peaks is the huge pyramid of Shispare (7,611 m/24,970 ft). Along the southwest ridge of the massif are Hunza Peak and the striking rock spire of Bublimotin (Ladyfinger Peak). The glaciers draining the slopes of the massif are (clockwise from north): the Ghulkin Glacier, the Gulmit Glacier, the Ahmad Abad Glacier, the Ultar Glacier, and the Hasanabad Glacier. (Many of these have other names as well.)