Nepal is one of the most popular destinations in the world for the Adventure trekking, climbing and expeditions, and most of those areas are located in Remote part of Nepal in the Himalayas So, Personal travel insurance is must have when you are travelling to Nepal and doing trekking, climbing and Expedition. In most of those areas are and some activities such as rafting, Bunjy and paragliding are restricted without having insurance. And when you take your insurance policy, please make sure that it covers trekking, Climbing and Expedition in mountain regions, evacuation and any other activities you may want to do in Nepal.
Among many travel Insurance company- we have found World Nomads is good company so, you can check with them once.
Global travel insurance. 
