| Rivière à l’Orme | |
| Name Other: | English: Elm River |
| Map: | Ile-aux-Tourtes Bridge.JPG |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Quebec |
| Subdivision Type3: | Region |
| Subdivision Name3: | Montreal |
| Length: | 5.1km (03.2miles)[1] |
| Source1: | Urban creek |
| Source1 Location: | Pierrefonds, Quebec, Montreal, Quebec |
| Source1 Coordinates: | 45.4431°N -73.8853°W |
| Source1 Elevation: | 31m (102feet) |
| Mouth: | Lac des Deux Montagnes (anse à l’Orme) |
| Mouth Location: | Senneville, Quebec, Montreal, Quebec |
| Mouth Coordinates: | 45.4503°N -73.9381°W |
| Mouth Elevation: | 23m (75feet) |
The Rivière à l'Orme (English: Elm River) is a tributary of the Lac des Deux Montagnes, flowing into the territory of Pierrefonds, Quebec and Senneville, Quebec, in the city of Montreal, in Quebec, in Canada.
The course of the river mainly passes through urban areas with urban park areas.
Annually, the surface of the river is generally frozen from mid-December to late March, however, the period of safe ice circulation is usually from late December to mid-March.
The hydrographic slopes adjacent to the "rivière à l’Orme" are:
The "rivière à l’Orme" originates in the southwestern part of the Pierrefonds borough of Montréal, on the west side of the Cineplex Kirkland Theater.
From its source, the "rivière à l’Orme" flows over according to the following segments:
The "rivière à l’Orme" empties on the East shore of “Anse à l'Orme”, which is a natural extension of the Lac des Deux Montagnes. At the end of the course, this river crosses the L'Anse-à-l'Orme Nature Park. This cove is bounded by Pointe Madeleine (North side) and Pointe Boyer (South West side). The mouth of this river is located at:
Since at least 1925, some documents attest to the use of the toponym "Rivière à l’Orme", designating this urban stream. This designation (in its present form) evokes the work of life of “Julien Hubert dit de Lorme”. The latter benefited from a concession in 1668, a lot of land adjacent to the Orme cove, located at the western end of the island of Montreal, just South-West of the “Cap à l'Orme”. In the past, many historians mistakenly believed that this toponymic designation was explained by the presence of elms in this area. The toponymic names "Cap à l'Orme », « Anse à l'Orme » and « Rivière à l'Orme" are intertwined.
The toponym "Rivière à l'Orme" was formalized on December 5, 1968, at the Commission de toponymie du Québec, i.e. at the creation of the Commission.[3]