Just south of San Diego, just 2 minutes outside of Rosarito on the 'free' road the street is being dug up, and the entire area is a giant mug hole. I was there in late December, and the whole place was a mess. This was just north of the Fox studios - Baja... Plus, there's some damn good sand dunes right on the beach if you go south of Rosarito near Puerto Nuevo. Guys take their trucks, suvs, buggies, and quads there every weekend. They also stage International quad races there every spring...