Great Himalayan Trail is a trek through the whole Nepal along the main Himalayan range. There are two possible variations - the highland route (with altitudes in the range of 3500m-6000m) and a simpler option, closer to the plains. Additional difficulties will be caused by climatic conditions of Nepal. In summer the rainy season begins, and in winter it is cold in the mountains.
The highest passes on the route are in the east. And if you start moving from the east, you will have to start either immediately after the end of the rains (at the end of September) or at the beginning of April. In the first case, it is very likely to finish at the west of Nepal in the deep of winter, and in the second, there is a risk of being stuck near the high passes due to unstable spring weather after that almost the entire route goes in the rain and snow.
I think, it is better to go from west to east. Then, at the beginning of the journey, you will have to go in the rain, but not for long, because in some western regions of Nepal there is almost no rain (for example, in Mustang and Dolpo). And if you start the trek from the west, you can start it with a visit to Kailash, which is located very close to the border with Nepal at the westernmost point of the country.
The trek from the west: Kailash - Simikot - Rara - Dolpo - Mustang - Manang - Langtang - Gokyo - Khumbu - Makalu - Kachenjunga.
On the route it is possible to visit all the Nepalese eight-thousanders: Dhaulagiri, Annapurna, Manaslu, Shishipangma, Chow-Yu, Everest, Lhotse, Makalu and Kachenjunga.
If I'll go to all the places that interest me, make radial exits and periodically rest, then the estimated travel time of this entire route will be 195 days.
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