Hi, I as wondering if some SDers can give me some advice...

I have to work at Del Mar Racetrack next week and want to take some time off for a quick ride. (No showering facilities so I don't want to get too skanky)

Can anyone recommend a short route (20-25 miles) that departs from the track? I don't know the area well at all. In fact, when I go there via the 5, it's an off-the-freeway-get-back-on-the-freeway kind of thing. I looked at a map, but I'm not sure which streets are ridable and which ones to stay away from.
I'll probably be riding between 9am-11am, so it's after rush hour.
Any suggestions will be appreciated!