Nepal is one of the unique country than other countries in the world where one can find different climate and geographical situation and season as well.
People of the world can visit this country around the year for tour and trekking. Normally, 4 season are in Nepal and people think in rainy season there is not possible trekking but this is wrong because many trekking regions can be gone in this time too. Because some parts of Nepal are not rained in rainy season which runs opposite too.
Upper Mustang and Upper Dolpo of Nepal which really remote zone and restricted area of Nepal which places are popular for trekking normally 10 days and more. Rainy season is good time for trekking in this area and it is totally dry in rainy season and one freely can do trekking with good weather and temperatures. Upper Mustang Trekking season is stared from Last week of May to Last week of August. Also Upper Dolpo Trek also now good time to trek and visit.
So these trekking reasons are busy with trekkers. Upper Mustang Trek is similar to Tibet tour and weather with climate. Upper Dolpo trek to compare with Tibetan Land.
Except this trekking since some few years Annapurna Circuit Trek, Everest Base Camp Trek, All Nepal Package Tour, Annapurna Base Camp Trek, Ghorpani Poon Hill Trek, Nepal Exotic Tour, Buddhist Pilgrimage Tour and Best Nepal Tour are possible to organize.
This is for your kind information, I have informed to world.