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Gasherbrum I

Mountain

Hidden Peak (Gasherbrum I) is an eight‑thousander in the Karakoram; high‑altitude mountaineers attempt technical ascents, glacier approaches and extended expeditions from Gilgit‑Baltistan.

Gasherbrum I LahoreIslamabadKarachiHunza ValleySkarduPeshawarGasherbrum I
In this guide

Gasherbrum I essentials

Country: Pakistan
Driest months: Jan-Mar
Pay in: Rupee (₨)

Gasherbrum I at a Glance

About Gasherbrum I

Gasherbrum I is a mountain in the Karakoram range on the Pakistan-China border that reaches an elevation of 8,080 metres. It is one of the world’s 14 eight-thousanders and is known in mountaineering circles as a high, technical peak.

Climbing the mountain involves long approaches across the Baltoro Glacier system and technical high-altitude routes; expeditions are logistically complex due to the remoteness. The summit is sought by experienced high-altitude mountaineers and is typically attempted in the summer climbing season.

The peak is part of the Gasherbrum massif and has been the objective of international climbing expeditions since the mid 20th century. Its glaciers and ridges sit within the greater Karakoram landscape of steep peaks and deep glacial valleys.

Geographically the mountain lies in Gilgit-Baltistan within the central Karakoram, reached via long treks from base camps on the Baltoro Glacier and approached through Pakistan’s northern mountain valleys.

  • Eight-thousander status: One of the world’s 14 mountains higher than 8,000 metres, noted for its remote Karakoram location and technical climbing routes.
Things to Do
When to Go

Best Time to Visit Gasherbrum I

Gasherbrum I is usually attempted in the main Karakoram climbing season (June-August), when weather windows are most likely.

Climbing season (main)
June-August · base camp ~0-5°C; summit temperatures commonly -20°C to -40°C
The primary climbing window in the Karakoram - relatively more stable weather for high-altitude expeditions, but still very cold and technical.
Outside climbing season
September-May · much colder and more severe at altitude
Unreliable and hazardous conditions for high-altitude climbing due to extreme cold, storms and increased objective hazards.

Weather & Climate near Gasherbrum I

Climate

Gasherbrum I's climate is classified as Ice Cap - Ice Cap climate with freezing summers (peaking in August) and freezing winters (coldest in January). Temperatures range from -40°C to -6°C. Semi-arid with limited rainfall with a pronounced dry season.

Air Quality: AQI 31 Good
Best Time to Visit
DecemberJanuaryOctober
Temperature & Rainfall
Temperature Range
10°
Warmest Month
-39°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Poor -39° - -28° -48° 6 mm overcast 87% 6.3 m/s 0.5 low 9.9h
February Poor -40° - -27° -49° 7 mm overcast 91% 7.3 m/s 0.8 moderate 10.8h
March Poor -36° - -24° -46° 11 mm overcast 88% 8.9 m/s 1.4 high 11.8h
April Poor -29° - -20° -37° 13 mm overcast 81% 6.5 m/s 2.1 extreme 13.0h
May Poor -23° - -15° -31° 19 mm overcast 74% 7.9 m/s 2.6 extreme 13.9h
June Poor -19° - -11° -27° 17 mm overcast 70% 9.1 m/s 2.6 extreme 14.4h
July Poor -16° - -6° -20° 103 mm overcast 68% 7.3 m/s 2.7 extreme 14.1h
August Poor -15° - -6° -18° 89 mm overcast 71% 5.3 m/s 2.4 extreme 13.3h
September Poor -20° - -10° -25° 45 mm overcast 69% 7.5 m/s 1.8 very high 12.3h
October Poor -25° - -17° -33° 14 mm overcast 68% 7.9 m/s 1.2 high 11.2h
November Poor -32° - -22° -40° 6 mm overcast 74% 6.0 m/s 0.7 moderate 10.2h
December Poor -37° - -25° -45° 14 mm overcast 82% 5.8 m/s 0.4 low 9.7h
Getting There & Around

How to Get to Gasherbrum I

Gasherbrum I is reached via Pakistan’s Karakoram logistics route. Typical access is to fly to Islamabad then take a domestic flight to Skardu or Gilgit, followed by a multi-day jeep/overland drive to the village of Askole; from Askole climbers begin a long trek up the Baltoro Glacier to Concordia and on to the Gasherbrum base camps. There are no road links to basecamp-expect extended trekking and glacier travel after the last motorable point.

Tips for Visiting Gasherbrum I

  • Approaches to Gasherbrum I start from Skardu and proceed overland to Askole then via the Baltoro Glacier to Concordia; plan logistics (permits, porters, glacier transport) well in advance through a licensed expedition operator.
  • Climbing is confined to the summer window (roughly late June-August) when high‑altitude weather is most stable; allow additional days in your schedule for weather delays and gradual acclimatisation at successive high camps.
  • Secure the required Pakistani climbing permits and a local liaison officer before travel; international expeditions typically arrange these through the Alpine Club of Pakistan or licensed local agents - don't attempt to improvise on arrival.