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Almost opposite the Abruzzi Spur is the North Ridge,[1][2] which ascends the Chinese side of the peak. It is rarely climbed, partly due to very difficult access, involving crossing the Shaksgam River, which is a hazardous undertaking.[3] In contrast to the crowds of climbers and trekkers at the Abruzzi basecamp, usually at most two teams are encamped below the North Ridge. This route, more technically difficult than the Abruzzi,[citation needed] ascends a long, steep, primarily rock ridge to high on the mountain—Camp IV, the "Eagle's Nest" at 7,900 metres (25,900 ft)—and then crosses a dangerously slide-prone hanging glacier by a leftward climbing traverse, to reach a snow couloir which accesses the summit.[citation needed]