I got one for ya Max. Ride border to boarder from San Diego to Vancouver BC Canada should be about 1500 miles. I did this in 1975 was a great ride and I5 was not there then, it was hwy 99 all the way.
The guy who invented the first wheel was an idiot -
the guy who invented the second one... he was the genius!
Yup almost 1500 Larry, short about 150 miles,(need 1550) but the only thing I do not like is the I-5 before you hit Stockton, a lousy slow 2 lane Hwy clogged with truck traffic .
Might have to consider the West-East routes, although your route has the appeal for a kickback trip, with frequent stops.