Tengboche, Nepal: Monastery, Everest Views & the Mani Rimdu Festival on the Everest Trail www.treklanders.com Tengboche Monastery Nepal (3,867m): Everest Views, Festival & Trek Guide Discover Tengboche Monastery in Nepal (3,867m), the spiritual heart of the Everest region. Explore stunning Everest views, the Mani Rimdu festival, trek routes, altitude tips, permits, and the Everest Panorama Trek in this complete guide.