Originally known to the First Nations of the Okanagan Valley as Khiluk. Spotted Lake is a sacred medicine lake of the Okanagan People and is very highly concentrated with numerous different minerals. It contains some of the highest quantities (in the world) of magnesium sulfate, calcium and sodium sulphates. It also contains extremely high concentrations of 8 other minerals as well as some small doses of four others such as silver and titanium.
During World War I the minerals of Spotted Lake were used in manufacturing ammunition.