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.

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.