Frédéric-Back Park is an urban park in Montreal, Quebec, Canada. It is within the Saint-Michel environmental complex in the borough of Villeray–Saint-Michel–Parc-Extension. The 192-hectare area originally was a limestone quarry, then a landfill. It is in the midst of a transformation that will see the majority of it become the park. A trail of 5.5 kilometres (3.4 mi) encircles the center of the park. As of 2020, the park has a total area of 48 hectares. When the planned transformation is complete, the park will have an area of 153 hectares.