In October 1996 the author, a dental officer, was part of a group of ten people serving in the Royal Navy who walked the Annapurna circuit in conjunction with Five Valleys Travel and Trek Aid. The Annapurna circuit is situated in the north of Nepal bordering the Kingdom of Mustang and the Peoples Republic of China. It is a gruelling 20 day trek reaching the dizzy heights of 18,000 feet, passing through some of the most beautiful and immense scenery in the world. The following is a short account of his experiences.