Street crews are getting ready as well. Stacks of barricades are stationed near the many streets that will be blocked for the race.
"There are 550 diversion routes or road closures that divert people to other locations," said Nick Curl with the L.A. Marathon, adding that 5,542 barricades will go up along the marathon route.
Lisa Klever says she plans to stay clear of L.A. on Sunday.
"I am going to keep inside where it is nice and peaceful," said Klever.
Matthew Kleemeyer says if he needs to get anywhere near Downtown L.A., he will ride the rails. Metrolink and Metro rail officials say despite the marathon, there will be no disruption of the normally scheduled service in and out of Union Station.
"I am thinking to just keep to the subways and try to keep out of the way, the subway seem to be the way to go," he said.
During the marathon, the LAPD will be providing security along the marathon route. However, throughout the St. Patrick's Day weekend police will also be looking for party goers who decide to drink and drive.
"We all know that DUIs are a cause of major fatalities in the city of L.A., so we are doing 10 scheduled checkpoints to prevent the DUIs," said LAPD Officer Alex Martinez.