The Austin Marathon is back this weekend. The Marathon will cause road closures and public transit delays from Friday, Feb.

Roads will be closed around the routes starting Friday, then reopen after runners begin arriving around 2 p.m. Sunday.

formerly known as the 3M Half Marathon. The event starts at 7 a.m. in front of the Regal Gateway Theater at 9800 Stonelake Blvd. Here is what you need to know about traffic and road closures.