Nepal’s topography provides more than 250 peaks over 20,000 ft. (6,096 m) above sea level thus offer wide arrays of trekking options, it generally depends on your interest, amount of time, and money you can spend, your physical shape and experience you have.
For those with limited time, the best trekking routes would be Langtang Region, Lower Annapurna region, north of Pokhara, and around Kathmandu valley.
For those with adequate time, trek in Everest region, Manaslu region, or the full Annapurna circuit can be rewarding. A more difficult trek is the Kanchenjunga trek in the far-eastern Nepal. A good trekking book is recommended if you want more details on treks.

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