Toronto Waterfront Marathon road closures this weekend. Here’s what you need to know

Leonard Langat, centre in red, of Kenya, who won the men's division runs the 2025 TCS Toronto Waterfront Marathon, in Toronto, on Sunday, Oct. 19, 2025. THE CANADIAN PRESS/Sammy Kogan

The Toronto Waterfront Marathon will shut down a large section of the downtown core’s streets and highway this weekend.

The event features a 5K race on Saturday, and a half marathon and full marathon on Sunday.

As the name suggests, the lion’s share of the course takes place along the edge of Lake Ontario, with a section of track on Bathurst, Bloor, Yonge, and Bay streets.

Most of the closures take place early Sunday morning for the marathons, but a handful of road restrictions will be in place on Saturday morning for the 5K.

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Here’s what you need to know:

5K course - Saturday

• Bay Street will be fully closed from Queen Street West to Front Street and from Front Street to Lake Shore Boulevard West starting at 4 a.m. The road is scheduled to reopen later that afternoon at 1 p.m.
• Lake Shore Boulevard will be closed from Yonge to Bathurst streets from 8 a.m. to 11 a.m.

Half marathon, full marathon – Sunday

• Lake Shore Boulevard East will be fully closed from Carlaw Avenue to Woodbine Avenue from 8 a.m. to 3:30 p.m.
• In the west end, Lake Shore Boulevard West will be shut down from Windermere Avenue to Bathurst Street starting at 5 a.m. The road is expected to reopen at 2 p.m. A closure of the westbound lanes from Bathurst Street to Yonge Street will also take place at that time.
• Yonge Street will be closed at from Carlton to Gerrard streets starting at 7 p.m. on Saturday. A further closure on Yonge Street from Gerrard to Richmond Street takes effect at 3 a.m. on Sunday. A third section of the major roadway will be closed from Bloor Street to Carlton at 7 a.m. on Sunday. Those closures should lift by 11 a.m.
• Bathurst Street will be fully closed from Bloor Street West to Lake Shore Boulevard West starting at 7 a.m. before reopening at 11 a.m.
• Bloor Street is closed as of 7 a.m. from Bathurst to Yonge Street until 11 a.m.
• The closure on Bay Street stretches from Queen Street West to Lake Shore Boulevard West and will be in effect from Sunday at 5 a.m. to 5 p.m.

For a full list of the road closures, click here.