Many minerals are found in high concentrations in Spotted Lake; that causes the phenomenon that gives the lake its name. Spots form during summer when much of the water evaporates, leaving the minerals, which harden and form walkways among the spots. The water's colour is determined by the unique combination of minerals. The site, near Osoyoos in British Columbia, is owned by the First Nations and is not open to the public. However, it can be easily seen from Highway 3, which runs past the lake.