Expert / expedition
Extreme expedition — sustained technical climbing above 8,000 m
Sustained technical terrain or extreme-altitude expeditions.
45–60 days
Restricted / lottery
Pakistani expedition permit, liaison officer, and full agency logistics required; the approach alone is a week-long trek up the Baltoro Glacier.
Skardu
Crowds: low · most parties climb guided
A short mid-summer window (July–early August). K2's weather is notoriously less forgiving than Everest's, and good summit windows some years simply never come.
K2 concedes nothing: the Abruzzi Spur climbs steep rock (House's Chimney, the Black Pyramid) and the serac-threatened Bottleneck at 8,200 m, with no easy line anywhere on the mountain. It is listed here as the far pole of the scale — an objective for climbers with multiple 8,000 m expeditions behind them, not a goal to filter toward casually. The Baltoro approach beneath Trango and Gasherbrum is the most dramatic walk-in in mountaineering.
The highest point on Earth — less a technical climb than a two-month siege of logistics, altitude, and risk.
The most beautiful mountain in the Khumbu — and a genuinely technical prize for experienced alpinists.
The classic first 7,000er — technically moderate slopes where altitude and weather do all the fighting.