Welcome To the Haut-Saint-Laurent ValleyThe Haut-Saint-Laurent Valley is the southernmost and largest area in the Saint-Laurent plain in Quebec, with its fertile soils, its towns and villages dotting the banks of the great river and its tributaries, nestled in the foothills of the Laurentians and the Adirondacks. Situated near the US and Ontario borders and in the Montreal metropolitan area, the Haut Saint-Laurent Valley is a crossroads, a place of welcome and trade, populated with a proud and energetic people.