The Pink Lake

Josiah Thompson, Trey Cobb, Evan McLean, Colin Mayo

What is it?

The Pink Lake is a salt lake that is 245 acres, 2.485 miles long, and 1.243 miles wide. It was discovered in 1802 by Matthew Flinders. It's real name is Lake Hillier. It is a major tourist spot in Australia.


The Pink Lake is in Western Australia off the coast of Recherche Archipelago's largest island, Middle Island. The pink lake supports native migration bird. It is an uninhibited nature preserve covered in dense eucalyptus forest.

Why is it pink?

Scientists cannot figure out why Lake Hillier is pink. They think it’s caused by a reaction of sea salt and sodium bicarbonate (which is baking soda), or it is caused by red halophilic bacteria in the salt crusts. It could also be caused by the dye from the bacteria in the lake.