These challenging treks are a real adventure. At this level you hike long days at high altitude. It is possible that you need some mountaineering skills that envolve rope climbing. When you are up for a trek at this level, you should prepare yourself thoroughly. You will be hiking often at altitudes that exceed 5,000 meters and you will be sleeping in tents for longer periods.
For the challenging treks mountaineering experience is advisable and an excellent physical condition is a must.
You can fill in your remaining days in Nepal with a wide range of activities. Discover some days the jungle in one of the nationals parks in the South of Nepal, go enjoying the shores of Phewa lake in Pokhara or visit the cultural sites in Kathmandu Valley.