Saiful Muluk is a mountainous lake located at the northern end of the Kaghan Valley, near the town of Naran.

It is in the north east of Mansehra District in the Khyber-Pakhtunkhwa province, Pakistan and feeds water to Kunhar river.

At an elevation of 3,224 m (10,578 feet) above sea level, it is well above the tree line, and is one of the highest lakes in Pakistan.

Malika Parbat, the highest peak in the valley (el. 5,290 metres (17,356 ft) is near the lake. A fairy tale called Saif-ul-Muluk, written by the Sufi poet Mian Muhammad Bakhsh, talks of the lake.

It tells the story of the prince of Persia named Shahzada Saif Ul Malook who fell in love with a fairy princess named Shehzadi Badr-ul-Jamal at the lake.

The lake is accessible from the nearby town of Naran during the summer season but access during winter is limited.

Saiful Muluk was formed by glacial moraines that blocked the water of the stream passing through the valley.

The lake has rich eco-diversity and holds many species of blue-green algae.

Large brown trouts are found in the lake, weighing up to about seven kilograms.