



After crossing the Gulf, mariners would face many difficulties navigating up the river to Québec City, including narrow, sinuous channels, shallow waters, shoal deposits and strong tides. Lawrence discovered it was not easy to master: it was long, but never calm. The first European explorers who sailed the St. Lawrence Seaway was inaugurated, it has been a gateway to the heart of the continent. It has played a vital role over the last three centuries as an important artery for trade, communication, transportation and settlement. This water highway is at some spots as narrow as a large river and, at others, as wide as a small sea. Lawrence River is undeniably one of the most challenging for mariners.
