Mainville Lake is a Lake located in Rainy River, Ontario and has an elevation of 348 meters.

• Latitude: 48° 52' 6'' North   (decimal: 48.8683333)
• Longitude: 93° 13' 39'' West   (decimal: -93.2274999)
• Topography Feature Category: Lake
• Geographical Feature: Lake
• Canadian Province/Territory: Ontario
• Elevation: 348 meters
• Location: Rainy River
• Atlas of Canada Locator Map: Mainville Lake
• GPS Coordinate Locator Map: Mainville Lake Lat/Long