I guess you got the answers you require from my fellow contributors. However, if you do wish to embark on one of the most enticing and classic treks in the world, as listed in Hermann's trekking guides, without the use of any mode of modern transportation but just walk, you can do so by starting in Pokhara. From Tundikhel, walk up to Sarankot (with the blue waters of Lake Phewa flowing below), heading towards Naudada (accompanied by the stunning scenery of both sides of Pokhara valley behind), leading towards Chitre and Lumle (taste the legendary delicious water from the fresh streams and eat a few freshly made "sel rotis" and recently plucked oranges there), approaching Chandrakot (where you can see the majestic mountains of the Annapurna range right in front as if you can touch them), going down towards Nayapul (ankles hurt a little bit), crossing the bridge, over to Birethanti (tasty lunch of "dal" and "bhat" with sizzling ghee over it served by Thakalis who really know the meaning of taste) and finally the uphill trek to the mighty village of Ghandruk (where Gurung clans have resided for over 800 years). That, my friend, is the true and classic Pokhara to Ghandruk trek, as experienced countless times myself over the past thirty years as I went to and from my village. Whilst trekking, never hurry but take the time to enjoy the wonderful environment and beauty around you. Believe me, it's worth every second.