Lac à Alcidas is a Lake located in Les Îles-de-la-Madeleine; Les Îles-de-la-Madeleine, Quebec.

• Latitude: 47° 13' 8'' North   (decimal: 47.2189584)
• Longitude: 61° 58' 39'' West   (decimal: -61.9776190)
• Topography Feature Category: Lake
• Geographical Feature: Étang
• Canadian Province/Territory: Quebec
• Location: Les Îles-de-la-Madeleine; Les Îles-de-la-Madeleine
• Atlas of Canada Locator Map: Lac à Alcidas
• GPS Coordinate Locator Map: Lac à Alcidas Lat/Long