The Annapurna Circuit is a trek within the mountain ranges of central Nepal. The total length of the route varies between 160–230 km (100-145 mi), depending on where motor transportation is used and where the trek is ended. This trek crosses two different river valleys and encircles the Annapurna Massif. The path reaches its highest point at Thorung La pass (5416m/17769 ft), reaching the edge of the Tibetan plateau.

The trek begins at Besisahar or Bhulbhule in the Marshyangdi river valley and concludes in the Kali Gandaki Gorge. Besisahar can be reached after a seven-hour drive from Kathmandu. The trail passes along paddy fields and into subtropical forests, past several waterfalls and gigantic cliffs, and through various villages.

Annapurna Circuit has been voted the best long-distance trek in the world, as it combined, in its old full form, a wide variety of climate zones from the tropics at 600 m asl to the Arctic at 5416 m asl at the Thorong La pass