Lac Ouapetec is a Lake located in Lac-Walker; Sept-Rivières, Quebec.

• Latitude: 51° 8' 24'' North   (decimal: 51.1400509)
• Longitude: 66° 31' 43'' West   (decimal: -66.5285418)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Walker; Sept-Rivières
• Atlas of Canada Locator Map: Lac Ouapetec
• GPS Coordinate Locator Map: Lac Ouapetec Lat/Long