If you're going to be downtown this weekend, you're going to feel the traffic crunch.

The Annual Toronto Scotiabank Marathon is on this weekend, and that will have roads closed at different times on Sunday.

This years event not only features a full 42.2 kilometer marathon course, but also a half marathon (21km) and a 5k run as well.

It's also IAAF and Athletics Canada Certified, which means it serves as a qualifyer for the Boston Marathon and the Olympics.

About 25 thousand atheletes are expected to decend on the city from 50 different countries.

For the complete list of road closures, click HERE