K2: ESTABLISHED ROUTES
Notable for: first ascent route, standard route, most successful summits
First accent: July 31, 1954 (Lino Lacedelli, Achille Compagnoni)
the magic line
Notable for: Messner's coining the line but abandoning it for the Abruzzi, it's aesthetic appeal that one seemingly has to be a true mountaineer
First accent: TBD
Notable for: less crowds, technical difficulty, avoids the whole shoulder-bottleneck-traverse situation where many of the Pakistan routes converge at a shared high camp low on the shoulder.