Peter Bohren made three first ascents in the Bernese Alps. On August 11, 1858 he jointly made the first ascent of the Eiger (3967 m above sea level), climbing via the west face with fellow guide, Christian Almer, and Charles Barrington. The group started at 3:30 a.m. at the Hotel Wengernalp and the mountaineers reached the summit of the Eiger in the fog at 12 noon.