Walk up the Baltoro Glacier and you will see K2, Broad Peak, Gasherbrum IV and Gasherbrum II. But the highest of the Gasherbrums stays out of sight until you are almost at its foot. That is why the explorer Martin Conway named itHidden Peak in 1892. Today it is better known asGasherbrum I (8,080 m), the eleventh highest mountain on Earth. It is a quiet and beautiful 8,000 m peak, less crowded than its neighbours, with a normal route through the famous Japanese Couloir. Our 46 dayGasherbrum I expedition follows the Baltoro to a full service Base Camp shared with Gasherbrum II.
New to the region? Read ourK2 and the Karakoram Ranges, with an interactive map, the 20 highest peaks and the best time to visit.
This guide covers the mountain, its history, the normal route and camps, the expedition plan, the experience you need, combining it with Gasherbrum II, oxygen and porter options, gear, safety and FAQ.
Gasherbrum I at a glance
| Summit | 8,080 m, eleventh highest on Earth |
| Other name | Hidden Peak |
| Location | Head of the Baltoro, Gasherbrum group, Central Karakoram |
| Duration | 46 days, Islamabad to Islamabad |
| Route | Normal route via the Gasherbrum icefall and Japanese Couloir |
| Base Camp | About 5,000 m, shared with Gasherbrum II |
| First ascent | 5 July 1958, Pete Schoening and Andy Kauffman |
| Best season | Mid June to early August |
Where is Gasherbrum I?
Gasherbrum I stands at the head of the Baltoro Glacier, on the border between Pakistan and China, in the Gasherbrum group with Gasherbrum II, III, IV and V. The approach is the classic Baltoro trek: Askole, Jhola, Paiju, Urdukas, Goro II and Concordia, then east along the upper Baltoro to the Abruzzi Glacier and the Gasherbrum Base Camp.
History
- 1892: Martin Conway names it Hidden Peak because it is hidden behind other mountains.
- 1936: A French expedition makes the first serious attempt.
- 5 July 1958: An American expedition led by Nick Clinch makes the first ascent.Pete Schoening and Andy Kauffman reach the summit.
- 1975: Reinhold Messner and Peter Habeler climb a new route on the north west face in pure alpine style, the first alpine style ascent of an 8,000 m peak.
Why climb Gasherbrum I?
- An 8,000 m peak with fewer crowds. Quieter than Gasherbrum II and Broad Peak.
- A beautiful route. The Gasherbrum cirque and Japanese Couloir are spectacular.
- Combine with Gasherbrum II. Both peaks share the same Base Camp and lower route.
- The Baltoro journey. Eight days through some of the greatest mountain scenery on Earth.
The normal route and camps
Heights are approximate.
- Base Camp, about 5,000 m. On the Abruzzi Glacier, shared with Gasherbrum II.
- Camp 1, about 5,900 m. Above theGasherbrum icefall, a complex maze of crevasses and seracs, crossed early in the morning.
- Camp 2, about 6,400 m. In the upper Gasherbrum cirque, below the north face of Gasherbrum I.
- Camp 3, about 7,000 m. At the top of theJapanese Couloir, a steep snow and ice gully climbed on fixed rope.
- Summit, 8,080 m. A long summit day on snow slopes and mixed ground.
Expedition itinerary
Days 1 to 4: Islamabad and Skardu
Arrival, expedition briefing, flight to Skardu (or the Karakoram Highway if cancelled) and final preparations.
Day 5: Jeep from Skardu to Askole (3,000 m)
Days 6 to 13: The Baltoro approach to Gasherbrum Base Camp
Askole, Jhola, Paiju with a rest day, Khoburtse, Urdukas, Goro II, Concordia and Gasherbrum Base Camp.
Climbing period, about four weeks
- Rest and skills time at Base Camp
- First rotation: through the icefall to Camp 1 and back
- Second rotation: sleep at Camp 2
- Third rotation: up the Japanese Couloir to Camp 3 and back
- Rest at Base Camp and wait for a summit window
- Summit push and descent
- Spare days for weather
Walk out and return
Down the Baltoro to Askole, jeep to Skardu, flight to Islamabad, debriefing and home.
How difficult is Gasherbrum I?
Gasherbrum I isharder than Gasherbrum II but less technical than K2. Expect:
- The Gasherbrum icefall with crevasses and seracs
- The Japanese Couloir, steep snow and ice on fixed rope
- Long, cold summit day above 7,000 m
- Strong winds high on the mountain
Experience you need
- At least one 7,000 m peak and ideally an 8,000 m peak
- Good crampon and ice axe skills
- Extensive fixed rope experience
- Excellent fitness and endurance
Combining Gasherbrum I and II
Because both peaks share the same Base Camp, Camp 1 and Camp 2 area, strong climbers sometimes attempt both in one expedition. Usually Gasherbrum II is climbed first, then Gasherbrum I after a rest at Base Camp. This needs two permits and extra time. Read ourGasherbrum II expedition and ask us about the combined plan.
Oxygen and high altitude porters
Many climbers summit Gasherbrum I without supplementary oxygen. Oxygen and personal high altitude porters are available on request.
Safety
The icefall is the main hazard on the lower route. We cross it early in the day, use experienced high altitude staff and fix rope where needed. We keep a satellite phone, first aid kit and medical oxygen at Base Camp. Your insurance must cover mountaineering on 8,000 m peaks and helicopter rescue.
Best season
Mid June to early August. July usually brings the best summit windows.
Gear list
- 8,000 m boots and crampons
- Ice axe, harness, helmet, ascender, belay and abseil devices
- 8,000 m down suit and expedition mittens
- Sleeping bag rated to about -35 °C
- Goggles and glacier glasses
- Oxygen mask and regulator (if using oxygen)
What is included
- Airport transfers and hotels in Islamabad and Skardu
- Flights Islamabad to Skardu and back (road travel if cancelled)
- Jeep transport Skardu to Askole and back
- Royalty, permits, national park fees and liaison officer
- Porters for the approach and return
- Full service Base Camp with cook and kitchen staff
- All meals on the trek and at Base Camp
- Base Camp tents, dining tent, kitchen tent, shower and toilet tents
- Satellite phone, first aid kit and medical oxygen at Base Camp
- High altitude porters and oxygen (on request)
Gasherbrum I FAQ
How high is Gasherbrum I?
Gasherbrum I is 8,080 m, the eleventh highest mountain on Earth.
Why is it called Hidden Peak?
Martin Conway named it Hidden Peak in 1892 because it is hidden behind other mountains from most of the Baltoro.
When was Gasherbrum I first climbed?
On 5 July 1958, by Pete Schoening and Andy Kauffman of an American expedition led by Nick Clinch.
Which route do you climb?
The normal route through the Gasherbrum icefall, the Gasherbrum cirque and the Japanese Couloir.
How difficult is Gasherbrum I?
It is harder than Gasherbrum II, with an icefall, the steep Japanese Couloir and a long summit day, but less technical than K2.
Can I climb Gasherbrum I and II in one expedition?
Yes, with two permits and extra time. Both peaks share the same Base Camp and lower route.
How long is the expedition?
46 days from Islamabad to Islamabad.
Do I need supplementary oxygen?
It is optional. Many climbers summit without it, but we can provide oxygen on request.
When is the best time to climb Gasherbrum I?
Mid June to early August, with July usually the best month.
Do I need a permit?
Yes. Discover Karakoram arranges the royalty, permits, national park fees and liaison officer. We need a copy of your passport and visa in advance.
Do I need insurance?
Yes. You need insurance that covers mountaineering on 8,000 m peaks, medical treatment and helicopter rescue.
How much does the Gasherbrum I expedition cost?
Prices are on request and depend on team size, oxygen and porter support. Contact us on WhatsApp +92 355 5733499 or by email at discoverkarakoram@gmail.com for a quote.
Climb Gasherbrum I with Discover Karakoram
Discover Karakoram has run expeditions from 6,000 m peaks to 8,000 m giants on the Baltoro. Our founderRozi Ali has led expeditions in the Karakoram for about 40 years, and we are a government licensed operator (DTS No. 2369). Bookings are open for 2027, prices on request. See theGasherbrum I expedition page orcontact us for a quote.
