The circuit, beginning at Besi Sahar and ending usually at Naya Pul, is considered the "classic" trek in Nepal. The walk starts off in sub-tropical forests and terraced farm lands and climbs through oak and rhododendron forests into fir and pine and finally into sub-alpine. Then the pure alpine regions of the magnificent Thorung La pass (5416m). The diversity of cultures in this region matches the eco-diversity. This route provides an excellent “window” through which you can view a wonderful cross section of Nepal. If you have the time to visit only one sector of this country-make it the Annapurna region. Spectacular, close-up views of soaring, ice-capped peaks, tumbling waterfalls, lush forests, craggy high passes provide the backdrop for ancient walled villages and people representing many of Nepal’s ethnic groups. This is an experience that cannot be missed.

In terms of mileage, this is one of the longest treks in Nepal. Despite the length, some sections are moderately easy with the serious challenges beginning above Manang and crossing the pass. From Thorung Phecli the trail climbs 1000m to the Summit and then descends 1600m to the scared pilgrimage site of Muktinath. The west side of the Circuit is no less interesting than the eastern sector, although it is more developed. The villages of Kagbeni, Marpha and Tukuche are all worthy of extra time to enjoy.

For those wanting shorter treks, many options exist to visit only part of this fascinating area.