If you do not have much time or you want to get familiar to treks in Nepal, then you can go for 4-day treks in Nepal. Although, where you want to trek is completely upto you considering the fact that Nepalis are very hospitable and welcoming towards guests.
However, there are some of the treks that are custom designed for you to complete in four days.
Poon Hill Trek
Poon Hill is a good trek for beginners as well as experts. The trek starts from the elevation of 1100 meters, and it rapidly rises in the way meeting Poon Hill at 3210 meters.
During these four days, you will be passing forests full of rhododendron trees and flossing streams. On your way, you will reach Ghorepani from where you can have spectacular views of Himalayas.
The major mountains you will be seeing are Annapurna, Gangapurna, Lamjung Himal, Nilgiri, and Dhaulagiri.
Mardi Himal Trek
This trek can be completed in four days as well. Recently this trek is getting popular as well for both the foreigners and well as domestic trekkers.
Mardi Himal Trek was only opened in 2012 AD. The trail itself follows the footsteps of shepherds who bring their flock here for summer grazing. The trek itself is relatively easy.