I have a conference I'm going to in Los Angeles in a couple of weeks and I need to ride some to get miles in before a couple of upcoming centuries. I've never riden in LA and am interested in knowing if there are good routes to put on 50-100 miles without leaving the city to start. I'll be staying near the convention center - I'll also need to rent a rig. Any suggestions on where to rent/ride? Any maps or websites to give me some clues?

Thanks,
Bob