Sulphur Mountain is a mountain in Banff National Park in the Canadian Rocky Mountains overlooking the town of Banff, Alberta, Canada. The mountain was named in 1916 for the hot springs on its lower slopes. George Dawson had referred to this landform as Terrace Mountain on his 1886 map of the area. Sanson's Peak was named in 1948 for Norman Bethune Sanson who diligently attended the observatory recording equipment atop Sulphur Mountain for nearly 30 years. Two hot springs have been commercially developed. The lowest is the Cave and Basin National Historic Site and the highest is the Banff Upper Hot Springs.