The Bularung Sar (Urdu: بلرنگ سر) is a 7,200 metres (23,622 ft) mountain in the Karakoram mountains range, Gilgit-Baltistan, northern Pakistan.

It belongs to the range, called Hispar Muztagh, and is located between two other important peaks, Distaghil Sar and Trivor.

[1][2] On the northern flank flows Momhil glacier, on the southern slope runs Kunyang glacier.

The first ascent took place in July 1990 by a Swiss expedition on the south ridge.

[1][3] were members of the expedition: Alain Vaucher, Heinz Hügli, Lothar Matter, Carole Milz, Thierry Bionda, Christian Meillard, Gérard Vouga, Vincent von Kaenel, Jean-Jacques Sauvain and Jacques Aymon.