The west flank of the Eiger mountain wasn’t so difficult — a team of climbers reached the summit in 1858. But the Eiger North Face is intimidating, complex and dangerous. It was another 80 years before anyone reached the summit by way of the northern flank. At least six people died trying in the three years before a team of Germans and Austrians made it to the top. In July, mountaineers will celebrate the 75th anniversary of the first successful climb of the North Face, and an exhibition on the mountain’s history will open July 2 at the Grindelwald Museum.