Along with a diverse selection of urban and nature parks that offer a multitude of free activities year round, all Montreal museums have a free day, usually once per week. Often seniors and children are admitted free and one day a year, usually around May 24th, all Montreal museums are free for the entire day for visitors of all ages.
Take in free festivals at a convenient site on Ste. Catherine Street East, enjoy free outdoor movies and visit the large indoor/outdoor farmer's markets notably Jean Talon in the north end of the city and the Atwater Market in Montreal's west end. Both are conveniently located near metro stops.
Montreal's Notre Dame Bascilica is located in Old Montreal, site of free walking tours and firework displays while the nearby Old port area provides great walking and cycling routes along the river. Montreal is a fantastic walking city that provides plenty of people watching particularly on St. Denis and St. Laurent streets famous for Montreal boutique shopping.
The Montreal casino offer free shows, free admission and free parking in a scenic setting complete with bars and restaurants. For rainy days visit the Grand Library and the Redpath Museum on the site of McGill University. Two contemporary art museums, the DHC in Old Montreal and L’Arsenal in Griffentown also offer free admission.