page_title: Sainte-Thérèse Island (Saint Lawrence River)
section_title: Geography
hierarchical_section_title: Sainte-Thérèse Island (Saint Lawrence River) / Geography
caption_attribution_description: Français&#160;: Maison Durocher construite en 1913 sur l'île Sainte-Thérèse. La maison est menacée par l'érosion de la rive causée par le batillage
context_page_description: Île Sainte-Thérèse is an island of the Saint Lawrence River, located northeast of Island of Montreal. Administratively attached to the municipality of Varennes, located in the Marguerite-D'Youville Regional County Municipality, in Montérégie, in the province of Quebec, in Canada.
  This island has an area of approximately 5.4 square kilometres, making it the fifth most extensive island in the Hochelaga Archipelago.
context_section_description: Île Sainte-Thérèse is 4.8 kilometres (3.0 mi) long and 1.6 kilometres (0.99 mi) wide. Its subsoil (limestone in the western part, shale clay in the eastern part) is covered with a layer of clay sand suitable for agriculture. The banks of the island are composed of clay and sand and are sensitive to erosion.
  The 11 km perimeter area is almost uninhabited and accessible only by boat. The island is made up of agricultural land, marshes and forest. A farmer grows soybeans there. The island is surrounded by several chalets, for the most part without occupancy rights, on land belonging to the Government of Quebec. Some private properties are present such as the Durocher house which is one of the last buildings testifying to the agricultural occupation of the island.
caption: Example of banks on the island eaten away by erosion caused by the wake. The Durocher house is threatened by this erosion.
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