Gosain Kunda can be either a destination, a stopover, or a traverse. As a destination, it can be done in a relaxed way in five days, giving oneself enough time to acclimatise and take in the views. It is better not to rush it.
Trekkers can also just stopover in Gosain Kunda and continue along a narrow path around a steep spur and descend to Langtang Valley two days away. As a traverse, hikers from Dhunche can cross the pass and descend to Helambu and back to Kathmandu. Or, if you really want to punish yourself, you can do that route counter-clockwise. The trails are now much more stable after the earthquake four years ago.
The simplest itinerary is to take a 5-7 hour bumpy jeep ride to Dhunche, and if you want to get away from the sound of trucks, head off immediately to Deurali for the night. Those relatively more fit can climb on to Sing Gompa at 3,250m, a smallish settlement with tea houses and a monastery. It also has a government dairy outlet run by Chatra Bahadur Tamang where you can stock up on yak cheese.
Read also: The Tamu Trek Trail, Jit Gurung