The city of Toronto will host Canada’s largest marathon this weekend — the TCS Toronto Waterfront Marathon, taking place on Saturday and Sunday, October 18 and 19, 2025. More than 30,000 professional and recreational runners from 70 countries are expected to participate.

Over 100,000 spectators are anticipated to line the route, cheering on the participants and turning the city into a massive celebration.

This event, considered the highlight of the Canada Running Series, is recognized each year as a symbol of “health, inclusion, and city pride” in Toronto.

The 5K race will take place on Saturday, while the full marathon (42.2 km) and half marathon (21.1 km) will be held on Sunday.

This year, organizers have redesigned the routes to reduce road closures and make it easier for residents to move around the city. Toronto’s municipality, police, TTC, and City Council have all announced close cooperation to minimize traffic disruptions. However, the subway will not operate until 8 a.m. on Sunday, so participants are urged to plan carefully to arrive at the start line on time.

Since 2003, runners have raised over $55 million for 150 Canadian charities through the TCS Charity Challenge, and this year’s fundraising goal is expected to climb by another $3 million.