Radium Hot Springs, informally and commonly called Radium is a village of 1,339 residents in the East Kootenay region of British Columbia. The village is named for the hot springs in the nearby Kootenay National Park. From Banff, Alberta, it is accessible via Highway 93. The hot springs were named after the radioactive element when an analysis of the water showed that it contained small traces of radon which is a decay product of radium.