Here's a couple of sites that seem to have the most interesting places to see.
Trekking in Himalayas - HimalayanGlacier.com
15 Best Family Adventure Treks in Indian Himalayas - Tours to India
What are the top destinations for trekking in the Indian Himalayas?
I only know Everest
hampta pass trek, Hp, roopkund trek, chader trek,