In 1903, the constant growth of a hamlet far from Sainte-Anne-des-Plaines and Terrebonne led the Canadian Pacific to build a station at La Plaine.

As the number of residents of the small hamlet of La Plaine grew, they proposed in 1912 to establish a new parish that could be made up of the rows far from the churches of Saint-Lin, Mascouche and Sainte-Anne-des-Plaines.

It was the Bishop of Joliette who proclaimed the founding of the Saint-Joachim mission, made up of the distant rows of Saint-Lin and Saint-Henri-de-Mascouche.

However, five years later, the Bishop of Montreal finally authorized the annexation of the distant part of Sainte-Anne-des-Plaines to the Saint-Joachim mission.

La Plaine has a warm summer humid continental climate (Köppen climate classification Dfb) with warm humid summers and cold winters the lowest temperature ever recorded was -44°C (-47°F) on January 15th, 1957 and the highest temperature recorded was 37°C (99°F) on August 1st, 1975 The Forum de La Plaine is a 2,000-seat multi-purpose arena.