Annapurna conservation area has one of the most impressive mountain range in the world. There are seven major Himalayan peaks scaling over 7000 m. Kali Gandaki River flowing in between the Annapurna and Dhaulagiri peaks, both over 8000m is one of the world's deepest gorge. The southern fringe of this area receives the highest rainfall (approximately 5000 mm annually) in Nepal and supports magnificent moist forest including eight species of bamboo and extensive rhododendron forest in southern slopes. And variety of other habitats between the start of the trek from Pokhara (915 m) to Muktinath (3800 m), which is very close to the Tibet border. There is subtropical vegetation, the Sal Shorea robusta at 1000 m, through oak (2000 m - 2400 m), upper temperate mixed broad leafed (2400 m - 3200 m) or Rhododendron arboretum (2600 m - 3700 m), to birch forest (3200 m - 4000 m). Moist alpine scrubs and meadows occur above the tree line.

Fauna : Some 30 species of mammals have been recorded including snow leopard, leopard, black bear, red panda, ghoral, etc.

Avifauna : The avifauna is the most diverse of all Himalayan protected areas in Nepal, with a total of 440 species recorded so far. This is attributed to the great variety of habitat types and to the Kali Gandaki River that is a major bio-geographical divide for birds distribution as well as an international fly way. Out of 474 species, 329 breed or probably breed here. Some rare birds like Rufous-throated partridge, chestnut crowned bush warbler, pigmy blue fly catcher and 6 species of pheasants including cheer pheasant can be seen from Ghansa in the Kali Gandaki valley. A total of 200 species of the birds can been seen in two-weeks trek.