The 2019 Los Angeles Marathon will take place THIS SUNDAY. Website link is https://www.lamarathon.com/. The race course, which has not changed in the past few years begins at Dodgers Stadium and finishes up by the sea in Santa Monica, passing through and near many ionic Los Angeles areas and places.
The Marathon has HUGE impacts on the traffic. Here is where to find STREET CLOSURE as well as FREEWAY CLOSURES lists as provided by the LA Marathon website: https://www.lamarathon.com/race-weekend/street-closures.