Lac Saint-Pierre is a lake and nature reserve in Quebec, Canada. It is located on the Saint Lawrence River between Sorel and Trois-Rivières, east of Montreal and forms part of the Saint Lawrence Seaway. The reserve includes shoreline, islands, and wetlands.

This seasonally-flooded area is an important stopping point for hundreds of thousands of migrating waterfowl. It is also an important nesting area for herons: more have been counted here than in any other place in North America. In 1998, it was recognized as a wetland of international significance under the Ramsar Convention.

Lac Saint-Pierre was designated a biosphere reserve by UNESCO in 2000.

Environmental problems

---

Despite its biosphere reserve status, the lake contains an unknown number of unexploded bombs from tests in the 1950s through 2000s, and sewer waste from Montreal decreases the water quality.

External links

---

• Lac Saint Pierre Biosphere Reserve, Canada (UNESCO site)
• Aerial photo from Google Maps
• The Lake Was A Bomb Test Site-in French

Biosphere reserves | Lakes of Quebec | Ramsar sites

Lac Saint-Pierre