Lac Blais is a Lake located in Saint-Étienne-des-Grès; Maskinongé, Quebec and has an elevation of 93 meters.

• Latitude: 46° 27' 45'' North   (decimal: 46.4624999)
• Longitude: 72° 48' 17'' West   (decimal: -72.8047222)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 93 meters
• Location: Saint-Étienne-des-Grès; Maskinongé
• Atlas of Canada Locator Map: Lac Blais
• GPS Coordinate Locator Map: Lac Blais Lat/Long