Boulder Lake is a Lake located in Rainy River, Ontario and has an elevation of 404 meters.

• Latitude: 48° 29' 4'' North   (decimal: 48.4844444)
• Longitude: 91° 51' 39'' West   (decimal: -91.8608333)
• Topography Feature Category: Lake
• Geographical Feature: Lake
• Canadian Province/Territory: Ontario
• Elevation: 404 meters
• Location: Rainy River
• Atlas of Canada Locator Map: Boulder Lake
• GPS Coordinate Locator Map: Boulder Lake Lat/Long