Semicircle Lake is a Lake located in Frontenac, Ontario and has an elevation of 287 meters.

• Latitude: 44° 52' 49'' North   (decimal: 44.8802777)
• Longitude: 77° 9' 40'' West   (decimal: -77.1611111)
• Topography Feature Category: Lake
• Geographical Feature: Lake
• Canadian Province/Territory: Ontario
• Elevation: 287 meters
• Location: Frontenac
• Atlas of Canada Locator Map: Semicircle Lake
• GPS Coordinate Locator Map: Semicircle Lake Lat/Long