Maharloo Lake or Pink Lake, located in Shiraz, Iran, is indeed a seasonal salt lake. It is situated approximately 27.0 km (16.8 mi) southeast of Shiraz. The lake’s water is rich in potassium and other salts.

During periods of heavy rainfall, the seasonal river called Rudkhane-ye-Khoshk carries most of the floodwater into the lake bed. As summer progresses, the lake water gradually evaporates, exposing a white lake bed due to the high salt content. By mid-summer, the lake water may acquire a pinkish-red hue, which is a result of the presence of red tide within the lake. The red tide phenomenon refers to the proliferation of specific microorganisms, such as algae or bacteria, that can tint the water with shades of red, pink, or other colors.
Maharloo Lake offers a unique and picturesque sight, especially when it displays its pinkish-red coloration. Visitors often appreciate the beautiful scenery and the contrast between the pinkish lake water, the white salt crust, and the surrounding highlands.
Introduction
Maharloo Lake (Persian: دریاچه مهارلو) is a seasonal salt lake in the highlands of the area of Shiraz, Iran.[1] 27.0 km (16.8 mi) southeast of Shiraz, the lake salt is rich in potassium and other salts. Rudkhane-ye-Khoshk, a seasonal river flowing through the city of Shiraz, brings most of the flood water to the lake bed during intensive precipitation events. The lake water typically evaporates by the end of summer and exposes the white lake bed. By mid-summer and due to high evaporation rates and salt concentrations, the lake water turns pinkish red as a result of the red tide within the lake. Visit this lake at the right time of the year and you will have a glad surprise. The Maharloo Lake is a seasonal lake so during some parts of the year the lake is completely gone, leaving behind a salt desert. If you travelling during mid-summer will be able to see the lake at its full glory with its indescribably gorgeous pink tones.
Also, to see more attractions in this province, visit : Fars, Shiraz.