Really, the one web page you need to deal with the LA Marathon

More important than that all important race map is, or even a list of Marathon-caused road closures, is:

This comes via the City’s page of Traffic Conditions for the 2007 Los Angeles Marathon which provides plenty o’ detail on start times for specific races (Bike Tour, 5-K, etc.) and maps for both race courses, including detours.

Use it, abuse it, but most of all, good luck Marathoners (especially Will Campbell)!!!