Spotted Lake is a saline endorheic alkali lake located northwest of Osoyoos in British Columbia. It is located near the city of Osoyoos, beside Highway 3.Spotted Lake 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.