McAuslan Brewing opened in January 1989. It is a craft brewery in Montreal. After Moosehead Breweries Limited became a major (but not majority) shareholder, the brewery expanded into a new facility in 2002. McAuslan is still located on St-Ambroise street in the St-Henri borough and currently produces approximately 70,000 HL of beer annually.
In June 2008, Les Brasseurs RJ and La Brasserie McAuslan announced a business partnership specifically for sales, marketing and distribution of their respective brands both within Quebec and beyond.
The brewery hosts regular tours (every Wednesday) of its facility, as well as Centre St-Ambroise, a venue hosting concert of local independent bands. During the summer months, Terrasse St-Ambroise is open behind the brewery on the Lachine Canal bike path near the Cote-St-Paul locks.