Another thing I would suggest is to avoid CA-94 between Tecate and Otay Lakes Road, especially if Tecate bound. A group of 4 road this a couple of years ago, mid-week, in early afternoon, and we agreed the road was not at all enjoyable. In my 35+ years of touring, this was one of the worst. Narrow, twisty, LOTS of car and truck traffic. Going from Tecate to Otay would be much better as it is mostly downhill (somewhat steep). We basically had to take the lane as cars would try to pass us on blind curves, etc. At least we could hook it up to 30+mph due to the downhill. Going uphill (5+ miles?
) would have sucked big time. Maybe we hit at a bad time, but it really did suck.
My recommendation is to touch the border at Imperial Beach south of San Diego, ride up Santa Monica then take the Route 66 Route to Pasadena then work your way to the SC route at the intersection of Angeles Creast Highway and Angeles Forest Highway. Or
you could take the Southern Tier Route over to Pine Valley, CA and connect with the SC there.
Whatever you choose, enjoy the ride! John