Lac Obtus is a Lake located in Rivière-à-Pierre; Portneuf, Quebec and has an elevation of 473 meters.

• Latitude: 47° 8' 32'' North   (decimal: 47.1422222)
• Longitude: 72° 12' 13'' West   (decimal: -72.2036111)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 473 meters
• Location: Rivière-à-Pierre; Portneuf
• Atlas of Canada Locator Map: Lac Obtus
• GPS Coordinate Locator Map: Lac Obtus Lat/Long