Lac Desmarais is a Lake located in Saint-Denis-de-Brompton; Le Val-Saint-François, Quebec and has an elevation of 301 meters.

• Latitude: 45° 27' 42'' North   (decimal: 45.4617067)
• Longitude: 72° 7' 6'' West   (decimal: -72.1184356)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 301 meters
• Location: Saint-Denis-de-Brompton; Le Val-Saint-François
• Atlas of Canada Locator Map: Lac Desmarais
• GPS Coordinate Locator Map: Lac Desmarais Lat/Long