St. Mary Lake is a Lake located in Saltspring Island Land District, British Columbia and has an elevation of 54 meters.

• Latitude: 48° 53' North   (decimal: 48.8832999)
• Longitude: 123° 32' West   (decimal: -123.5332999)
• Topography Feature Category: Lake
• Geographical Feature: Lake
• Canadian Province/Territory: British Columbia
• Elevation: 54 meters
• Location: Saltspring Island Land District
• Atlas of Canada Locator Map: St. Mary Lake
• GPS Coordinate Locator Map: St. Mary Lake Lat/Long