Petit lac Isidore is a Lake located in Mont-Valin; Le Fjord-du-Saguenay, Quebec.

• Latitude: 49° 13' 45'' North   (decimal: 49.2291667)
• Longitude: 70° 56' 27'' West   (decimal: -70.9408333)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Mont-Valin; Le Fjord-du-Saguenay
• Atlas of Canada Locator Map: Petit lac Isidore
• GPS Coordinate Locator Map: Petit lac Isidore Lat/Long