In this image, you can see Highway 101 as it runs along the ocean. The path through the estuary is the train tracks for the Pacific Surfliner.
We like to go straight up the 5 to Carlsbad and then meander down along the coastline. Stop anywhere for a bite to eat. If you see a pretty piece of coastline, just pull over and hop out.
There are a lot of great restaurants in Encinitas, and Solana Beach has some cute boutiques for shopping!
The drive down Hwy 101 is a great way to spend a beautiful winter day in San Diego!