Marches à Thomas is a Lake located in Baie-des-Chaloupes; Antoine-Labelle, Quebec and has an elevation of 484 meters.

• Latitude: 46° 43' 38'' North   (decimal: 46.7272729)
• Longitude: 74° 47' 24'' West   (decimal: -74.7898998)
• Topography Feature Category: Lake
• Geographical Feature: Étangs
• Canadian Province/Territory: Quebec
• Elevation: 484 meters
• Location: Baie-des-Chaloupes; Antoine-Labelle
• Atlas of Canada Locator Map: Marches à Thomas
• GPS Coordinate Locator Map: Marches à Thomas Lat/Long