Getting around by car or transit Sunday morning could be slow going as 14,000 athletes take to the streets for the Goodlife Fitness Toronto Marathon, which is the city's oldest and biggest event of its kind.

The race gets underway Sunday morning in North York's Mel Lastman Square at 7:30 a.m.

Road closures in North York near the start line begin at 5:30 a.m. as the race sets up, but larger arteries won't be closed until 7 a.m., just before runners start down Yonge Street.

Yonge Street will be closed from south of Churchill Avenue all the way to Davenport Road, beginning at 7 a.m.

Ramps from Highway 401 onto Yonge Street southbound will also be closed, but are expected to reopen after the racers pass by, around 10 a.m.

Roads will be reopened once the runners pass and all roads should be back open by noon.

Police will be directing traffic at major intersections, but motorists are being told to expect some delays.

The finish line is at Ontario Place, 42.195 km from the start, and the first-place winners are expected to cross the line between 9:30 and 10 a.m.

One of the top finishers could be last year's winner, Brendan Kenny of Dundas, Ont., who will be back to defend his time of 2:27:19.2.

Last year's winner on the woman's side was Melissa Begin of Nashville, Tennessee, with a time of 2:54:50.9, which gave her a four-minute victory over the next closest woman, Nathalie Goyer of St. Bruno, Quebec.

Some of the funds raised by the marathon go towards Princess Margaret Hospital, as well as other charities. It is expected to raise more than $10 million for Toronto charities.

The Toronto Marathon isn't the only race happening in the GTA this weekend. The Mississauga Marathon also gets underway Sunday morning at 7:30 a.m., with road closures through the city, beginning at 6:30 a.m.