A demanding climb from the Hopper valley in Nagar, across the Barpu Glacier to one of the highest alpine lakes in the world — sitting at around 4,700m under Spantik and Malubiting.
Rush Lake sits at roughly 4,700m above the Hopper valley in Nagar, near Hunza — high enough to count among the highest alpine lakes in the world, and certainly among the highest in Pakistan. It is a small, cold sheet of water tucked into the meadows below Rush Pari peak, reached only after several days of walking and a glacier crossing. There is no road, no shortcut and no comfortable way to arrive; you earn every metre of the view.
And what a view it is. From the lake and the ridge above it you look across to Spantik (Golden Peak), Malubiting and the broad Karakoram skyline that runs back toward the Rakaposhi massif. The combination of altitude, ice and the open meadows of Rush Pari makes this one of the most rewarding treks in Gilgit-Baltistan — but also one of the more serious ones, and not a walk to underestimate.
Hopper (Hoper) valley: The trek starts from the villages of Hopper in Nagar, a drive up from the Karakoram Highway near Hunza. From here the trail drops to and crosses the glacier system before climbing toward the upper meadows.
Barpu Glacier: The route works its way across the Barpu Glacier — a long, debris-covered ice highway. Crossing it takes care, and the going is slow over moraine and ice; this is where a guide who knows the current safe line is most valuable, as glacier surfaces shift season to season.
Miar & Rush Pari meadows: Above the glacier the land opens into grazing meadows used as camps. These high pastures are the staging grounds for the final push and a good place to spend a night gaining altitude before going higher.
Rush Lake (~4,700m): A steady climb from the meadows reaches the lake itself and the ridge above, with its sweeping panorama of Spantik and Malubiting. Most parties take roughly 4 to 6 days for the round trip, descending the same way back to Hopper.
Make no mistake: this is a challenging high-altitude trek. At roughly 4,700m the air is thin and altitude sickness is a real risk — proper acclimatisation is not optional, and rushing the ascent is the single most common mistake. Build in nights at progressively higher camps, climb slowly, and be honest with yourself about how you feel; the lake is not worth pushing through serious symptoms for.
The glacier crossing adds genuine hazard. The Barpu is broken, moving ice with crevasses and loose moraine, and conditions change through the season. Go with an experienced local guide, not alone, and treat weather warnings seriously — the Karakoram turns quickly and cloud can erase the route up high.
| Best months | Roughly July to September, when the glacier and meadows are most settled |
| Main hazards | High altitude (~4,700m) and glacier travel — acclimatise properly and use a guide |
| Max altitude | Roughly 4,700m at the lake and ridge above |
| Access | Hopper (Hoper) valley in Nagar, a drive from the Karakoram Highway near Hunza |
| Costs & permits | Confirm current costs and any local permit requirements with a local operator before you travel |
Read more about the peak that crowns the view on the Spantik mountain page, browse other treks across Gilgit-Baltistan, find a vetted local agency, or plan a full Hunza and Nagar itinerary around it.
Most parties take roughly 4 to 6 days for the round trip from Hopper, including nights at the high meadows to acclimatise. The exact length depends on your pace and how much time you build in for altitude.
Rush Lake sits at roughly 4,700m, making it one of the highest alpine lakes in the world and among the highest in Pakistan. At that altitude the air is noticeably thin, so proper acclimatisation matters.
It is a serious, challenging trek. The main risks are high-altitude sickness at around 4,700m and crossing the Barpu Glacier, which has crevasses and shifting ice. Go with an experienced local guide, acclimatise slowly, and take weather seriously.
Roughly July to September, when the glacier and high meadows are most settled and the weather is most reliable. Outside this window snow and unstable conditions make the route harder and riskier.
The trek starts from the Hopper (Hoper) valley in Nagar, reached by a drive up from the Karakoram Highway near Hunza. Guides and camping support are usually arranged in Hopper or through operators in Karimabad.