This weekend the Scotiabank Toronto Waterfront Marathon will see more than 20,000 runners from 50 countries on the city's streets. Here's a look at the accompanying road closures:

-- Bay Street from Wellington Street to King Street will be closed from Saturday at noon to Sunday at 7 p.m. to accommodate the race's finish-line activities.

-- University Avenue from Front Street to Dundas will be closed on Sunday from 5:30 a.m. to 11:30 a.m. to accommodate the start-line activities.

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-- Full road closures will take place on Sunday from 5 a.m. to 3 p.m. for the race in the area bounded by Queen Street in the north, Victoria Park in the east, Lake Ontario in the south and Windermere Avenue in the west. Other roads in this area will be closed periodically.

Those attending race events at Exhibition Place and coming in from the west end should use the Spadina Avenue off-ramp and follow the detour signs. The Jameson Avenue off ramp will be opened at 11 a.m. to allow direct access to the Exhibition Place grounds.