Babusar Pass or Babusar Top is a mountain pass in Pakistan at the north of the 150 km long Kaghan Valley, connecting it via the Thak Nala with Chilas on the Karakoram Highway (KKH). Babusar Top is the highest point in Kaghan Valley that can be easily accessed by cars.

Chilas is a city in Pakistani-administered Gilgit–Baltistan in the disputed Kashmir region. It is the divisional capital of Diamer Division and is located on the Indus River. It is part of the Silk Road, connected by the Karakoram Highway and N-90 National Highway to Islamabad and Peshawar in the southwest, via Hazara and Malakand divisions of Khyber Pakhtunkhwa. To the north, Chilas connects to the cities of Tashkurgan and Kashgar in Xinjiang, China, via Gilgit, Aliabad, Sust, and the Khunjerab Pass.