Flat River Canyon is a Valley located in Mackenzie, Northwest Territories.

• Latitude: 61° 26' 20'' North   (decimal: 61.4387800)
• Longitude: 126° 36' 6'' West   (decimal: -126.6016816)
• Topography Feature Category: Valley
• Geographical Feature: Canyon
• Canadian Province/Territory: Northwest Territories
• Location: Mackenzie
• Atlas of Canada Locator Map: Flat River Canyon
• GPS Coordinate Locator Map: Flat River Canyon Lat/Long