For Christina's birthday, we drove the bikes down to Coronado and rode down to Silver Strand State Beach. When I looked at the satellite view of the trip, I realized that the ride had covered about half the distance from Coronado to Mexico (hence the title of the post).
The ride is really beautiful, with San Diego Bay on one side and the Pacific Ocean on the other. The beach is also very nice -- it's actually two beaches, one on each side.
All in all, a fun excursion, and a fitting way to celebrate Christina's birthday, since she got us on the biking kick starting with our trip to Holland almost a year ago.