Weather
The KKH is best travelled in the spring or early autumn. Heavy snow during harsh winters can shut the highway down for extended periods. Heavy monsoon rains, around July and August, cause occasional landslides that can block the road for hours or more. The border crossing between China and Pakistan at Khunjerab Pass is open only between May 1 and December 31 of every year.
Read more about this topic: Karakoram Highway