All treks in Bhutan are high altitude one, which require fair amount of good physical conditioning and shape in prior. And all other treks are good in its own way and sense. Jomolalhari trek still remains most popular in Bhutan for being moderate, its scenic beauty, mountains, wild life and standard time frame to complete the trek. In order to recommend other trek, it basically depends on the nature of physical shape and your liking. For instance, Snow Man trek, which can stretch as long as 32 days, very strenuous, which are recommended only for seasoned trekker, other simpler one like Druk Path and Bumthang owl trek for the shorter duration.