Q: There would be no time limit and the more coastal the route the better. Thanks so much
A: this could be a long long message so I will keep it simple; drive down and see Seattle, stop in Portland, definately drive the Oregon Coast, go into California and it is a must to go to San Francisco one of the best cities in the US head to to LA and take the route along the water rather then the I- 5 and check out all the beach cities, Malibu, Manhatten Beach. Longbeach, Venice Beach etc. I guess you could check out Disneyland in Anaheim if that is your thing, but Legoland is more fun, you will end up in San Diego and then viola you will be in Tijuana. you need special car insurance to drive in Mexico so make sure you get it. I would continue driving past Tijuana and continue down the Baja and see some beautiful Mexican cities. Tijuana is not the Mexico you want to see. This is a beautiful drive and there are so many things to see too numerous to mention. Contact your local AAA or CAA for maps and books. If you have the time then play it by ear. The Oregon coast will be your highlight so make sure you don't skip that part of your trip. Oregan doesn't have any tax so that is the best place to do your shopping too. Spend some time in Vancouver and Seattle too if you aren't familiar with either one of these cities as there is lots to see. You could also go Vancouver to Vancouver Island then the ferry from Victoria to Seattle if you wanted too. It takes around 15 hours to drive to San Franciso, 5 hours to Portland. Bring all your proper ID and proof that you have money for your trip, the border guards are jerks and you may need to prove that you are not planning to stay in the US. Good Luck!