The Lachine Rapids (french: Rapides de Lachine) are a series of rapids on the

Saint Lawrence River The St. Lawrence River (french: Fleuve Saint-Laurent, ) is a large river in the middle latitudes of North America. Its headwaters begin flowing from Lake Ontario in a (roughly) northeasterly direction, into the Gulf of St. Lawrence, connectin ...

, between the

Island of Montreal The Island of Montreal (french: Île de Montréal) is a large island in southwestern Quebec, Canada, that is the site of a number of municipalities including most of the city of Montreal and is the most populous island in Canada. It is the main ...

and the south shore. They are located near the former city of Lachine. The Lachine Rapids contain large

standing waves In physics, a standing wave, also known as a stationary wave, is a wave that oscillates in time but whose peak amplitude profile does not move in space. The peak amplitude of the wave oscillations at any point in space is constant with respect ...

because the water volume and current do not change with respect to the permanent features in the riverbed, namely its shelf-like drops. Seasonal variation in the water flow does not change the position of the waves, although it does change their size and shape. The rapids are about in length. In the past these represented a considerable barrier to maritime traffic. Until the construction of the

Lachine Canal The Lachine Canal ( in French) is a canal passing through the southwestern part of the Island of Montreal, Quebec, Canada, running 14.5 kilometres (9 miles) from the Old Port of Montreal to Lake Saint-Louis, through the boroughs of Lachine, ...

through Montreal, the rapids had to be

portage Portage or portaging (Canada: ; ) is the practice of carrying water craft or cargo over land, either around an obstacle in a river, or between two bodies of water. A path where items are regularly carried between bodies of water is also called a ...

d. Even with the canal, the difficulty was such that it was usually more convenient to ship goods by rail to Montreal, where they could be loaded at the city's port. Montreal remains a major rail hub and one of Canada's largest ports for that reason. The Lachine Rapids are now passed by the South Shore Canal (Saint-Lambert and Côte Sainte-Catherine locks) of the

Saint Lawrence Seaway The St. Lawrence Seaway (french: la Voie Maritime du Saint-Laurent) is a system of locks, canals, and channels in Canada and the United States that permits oceangoing vessels to travel from the Atlantic Ocean to the Great Lakes of North Americ ...

Wildlife

The rapids contain a number of islands used by

migratory birds Bird migration is the regular seasonal movement, often north and south along a flyway, between breeding and wintering grounds. Many species of bird migrate. Migration carries high costs in predation and mortality, including from hunting by ...

History

The first European to see the rapids was Jacques Cartier, who sailed up the

St. Lawrence River The St. Lawrence River (french: Fleuve Saint-Laurent, ) is a large river in the middle latitudes of North America. Its headwaters begin flowing from Lake Ontario in a (roughly) northeasterly direction, into the Gulf of St. Lawrence, connecting ...

in 1535, believing he had found the

Northwest Passage The Northwest Passage (NWP) is the sea route between the Atlantic and Pacific oceans through the Arctic Ocean, along the northern coast of North America via waterways through the Canadian Arctic Archipelago. The eastern route along the Arc ...

. In 1611,

Samuel de Champlain Samuel de Champlain (; Fichier OrigineFor a detailed analysis of his baptismal record, see RitchThe baptism act does not contain information about the age of Samuel, neither his birth date nor his place of birth. – 25 December 1635) was a Fre ...

named the rapids Sault Saint-Louis, after a teenaged crewman named Louis who drowned here; the name later extended to

Lac Saint-Louis Lake Saint-Louis is a lake in southwestern Quebec, Canada, at the confluence of the Saint Lawrence and Ottawa Rivers. The Saint Lawrence Seaway passes through the lake. Lake St. Louis is a widening of the St. Lawrence River in the Hochelaga Ar ...

. This name remained in use until the mid-19th century, but later came to be replaced by the name of the adjacent town of Lachine. The first Europeans known to have traveled above these rapids were Champlain and

Étienne Brûlé Étienne Brûlé (; – c. June 1633) was the first European explorer to journey beyond the St. Lawrence River into what is now known as Canada. He spent much of his early adult life among the Hurons, and mastered their language and learne ...

on the 13 June 1611. Brûlé continued upriver to live among the

Algonquin Algonquin or Algonquian—and the variation Algonki(a)n—may refer to: Languages and peoples *Algonquian languages, a large subfamily of Native American languages in a wide swath of eastern North America from Canada to Virginia **Algonquin la ...

, while Champlain himself would not travel further up the

Ottawa River The Ottawa River (french: Rivière des Outaouais, Algonquin: ''Kichi-Sìbì/Kitchissippi'') is a river in the Canadian provinces of Ontario and Quebec. It is named after the Algonquin word 'to trade', as it was the major trade route of Eastern ...

until May 1613. The first person to design a ship capable of shooting the Lachine Rapids was shipbuilder and carpenter John McQuaid, a native of

County Armagh County Armagh (, named after its county town, Armagh) is one of the six counties of Northern Ireland and one of the traditional thirty-two counties of Ireland. Adjoined to the southern shore of Lough Neagh, the county covers an area of and ha ...

, Ireland who later settled in

Kingston, Ontario Kingston is a city in Ontario, Canada. It is located on the north-eastern end of Lake Ontario, at the beginning of the St. Lawrence River and at the mouth of the Cataraqui River (south end of the Rideau Canal). The city is midway between Toro ...

with his family.

Recreation

Whitewater rafting Rafting and whitewater rafting are recreational outdoor activities which use an inflatable raft to navigate a river or other body of water. This is often done on whitewater or different degrees of rough water. Dealing with risk is often a ...

and jet boat expeditions to the rapids are available in Montreal. Though a life jacket is required.

Whitewater kayaking Whitewater kayaking is an adventure sport where a river is navigated in a decked kayak. Whitewater kayaking includes several styles. River running; where the paddler follows a river and paddles rapids as they travel. Creeking usually involving s ...

has become popular, along with

river surfing River surfing is the sport of surfing either standing waves, tidal bores or upstream waves in rivers. Claims for its origins include a 1955 ride of along the tidal bore of the River Severn. River surfing on standing waves has been documented a ...

, on a standing wave adjacent to the Habitat 67.().Habitat
/ref> The place is very good to visit and the best time to visit is between mid-winter/spring.

References

{{Reflist Landforms of Montreal Portages in Canada Saint Lawrence River Landforms of Montérégie Tourist attractions in Montérégie Lachine, Quebec Bodies of water of Quebec Rapids of Canada