Petit lac Saint-Gelais is a Lake located in Rivière-Mistassini; Maria-Chapdelaine, Quebec.

• Latitude: 50° 20' 54'' North   (decimal: 50.3484025)
• Longitude: 72° 21' 15'' West   (decimal: -72.3542718)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Mistassini; Maria-Chapdelaine
• Atlas of Canada Locator Map: Petit lac Saint-Gelais
• GPS Coordinate Locator Map: Petit lac Saint-Gelais Lat/Long