12 days Annapurna Circuit Trek? You may wonder if Annapurna Circuit Trek is possible to do in 12 days. Yes, we can do Annapurna Circuit Trek in even 12 days. This 12-day Annapurna Circuit Trek also like 16/17 days Annapurna Circuit Trek, has all required acclimatization days while ascending to the highest point, Thorongla Pass (5416m). Thorongla Pass is widely popular as one of the highest mountain passes in the world.