upper mustang

Hi all, May i know when is the best time to visit Upper Mustang on a motorbike? which date coincides with the Tiji Festival? What's special about the tiji Festival? We hear lots about festivals from my European friends. Which time to experience this? Thanks

I am trying to find the information on what are the permit cost to enter the Upper Mustang or Lower mustang for Indian citizens? I tried various forums but couldn't find any information. I found 500USD for Upper Mustang and 35 USD for Lower Mustang for other countries citizens but couldn't get...