Petit lac Thomas is a Lake located in Rivière-Mistassini; Maria-Chapdelaine, Quebec and has an elevation of 431 meters.

• Latitude: 49° 55' 48'' North   (decimal: 49.93)
• Longitude: 72° 10' 24'' West   (decimal: -72.1733332)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 431 meters
• Location: Rivière-Mistassini; Maria-Chapdelaine
• Atlas of Canada Locator Map: Petit lac Thomas
• GPS Coordinate Locator Map: Petit lac Thomas Lat/Long