Günther Oskar Dyhrenfurth (November 12, 1886 – April 14, 1975) was a German-born, German

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

 and Swiss

Switzerland

Switzerland name of one of the Swiss cantons. ; ; ; or ), in its full name the Swiss Confederation , is a federal republic consisting of 26 cantons, with Bern as the seat of the federal authorities. The country is situated in Western Europe,Or Central Europe depending on the definition....

 mountaineer

Mountaineer

-Sports:*Mountaineering, the sport, hobby or profession of walking, hiking, trekking and climbing up mountains, also known as alpinism-University athletic teams and mascots:*Appalachian State Mountaineers, the athletic teams of Appalachian State University...

, geologist and Himalayan explorer. He led the International Himalaya Expedition (IHE) 1930 to Kangchenjunga

Kangchenjunga

Kangchenjunga is the third highest mountain of the world with an elevation of and located along the India-Nepal border in the Himalayas.Kangchenjunga is also the name of the section of the Himalayas and means "The Five Treasures of Snows", as it contains five peaks, four of them over...

, and another one, IHE 1934, to the Baltoro

Baltoro

Baltoro may refer to:*Baltoro Glacier, a glacier in northern Pakistan*Baltoro Muztagh, a mountain range in northern Pakistan and northwestern China...

-region in the Karakoram

Karakoram

The Karakoram, or Karakorum , is a large mountain range spanning the borders between Pakistan, India and China, located in the regions of Gilgit-Baltistan , Ladakh , and Xinjiang region,...

s, especially to explore the Gasherbrum

Gasherbrum

Gasherbrum is a remote group of peaks located at the northeastern end of the Baltoro Glacier in the Karakoram range of the Himalaya on the border of the Chinese Shaksgam Valley and the Gilgit-Baltistan territory of Pakistan. The massif contains three of the world's 8,000 metre peaks...

-Group. This expedition made the first ascent of Sia Kangri

Sia Kangri

Sia Kangri is a mountain in the Baltoro Muztagh in the Karakoram. Its summit is on the Tibet and Pakistan border. It is the 63rd highest mountain in the world, and the 25th highest in Pakistan. The peak is on the watershed between the Indus River basin and the Tarim Basin...

 and some of its sub-peaks and provided detailed information about the accessibility of the 8000ers Gasherbrum I

Gasherbrum I

Gasherbrum I , also known as Hidden Peak or K5, is the 11th highest peak on Earth, located on the Pakistan-China border in Gilgit-Baltistan region of Pakistan and Xinjiang region of China. Gasherbrum I is part of the Gasherbrum massif, located in the Karakoram region of the Himalaya...

 and II

Gasherbrum II

Gasherbrum II , also known as K4, is the 13th highest mountain on Earth, located on the border of Gilgit-Baltistan province, Pakistan and Xinjiang, China...

. The first ascent of Gasherbrum I in 1958 was accomplished via the route proposed by Dyhrenfurth following the so-called IHE-spur and the SE-ridge.