The years 1861 to 1865 were filled with a number of new expeditions in the Mont Blanc massif and the Pennine Alps, among them the first recorded ascents of the Aiguille d'Argentière and Mont Dolent in 1864, and the Aiguille Verte, the Grand Cornier and Pointe Whymper on the Grandes Jorasses in 1865. That same year he also made the first crossing of the Moming Pass. According to his own words, his only failure was on the west ridge of the Dent d'Hérens in 1863. As a result of his Alpine experience, he designed a tent which came to be known as the Whymper tent and tents based on his design were still being manufactured 100 years later.