(We weren't actually in Mexico for Christmas, but "Feliz Año Nuevo" just doesn't have the same ring as "Feliz Navidad," hence the misleading title.)
We drove to Rosarito, Mexico a couple of days after Christmas and stayed for about a week. Our condo was right on a very secluded (almost completely empty) beach.
Rosarito is a town on the coast, a little south of Tijuana. It was the boys' first time experiencing another country.
Even though the water temps were not all that warm (guessing high 50's, low 60's) and the air temps were in the mid 60's most of the week, it felt so awesome after leaving the single digits in Utah (the car thermometer actually read -5 as we were driving through Mona, Utah). We spent a lot of time on the beach and playing in the surf.
After Lake Tahoe, cold water temperatures are no problem. Getting in can be hard, but you get numb after about 5 minutes, and then it's all good.
The Silly Grandma came with us...
...and Aunt Lori!
