The Los Angeles Marathon is Monday, May 25. To avoid traffic, plan your travel around the city accordingly. You can view a map of the route here.
If you want to check out the runners and see some interesting entertainment, head to mile 22 at Western and Olympic. Between 8 a.m. and 3 p.m., the Community Redevelopment Agency, Wilshire Center-Koreatown Neighborhood Council, and the Unification of Disabled Latin Americans are hosting a Latino-Korean Artistic Festival with performances ranging from Korean drummers to Folklorico dancing.