Langtang Valley, Nepal
The first part gives information about the difficulty of the track, transport to Langtang as well as the pricing. The second part will show the nature, track and accommodation on the track. About the permits: In 2018 you need a entry permit for $33 and a TIMS card for $20. The official use for TIMS is your safety. They say its needed in case of natural desasters to organise rescue and search.