I’ve grown up going on CA-49 more times than I could count (Downieville is such a beautiful gem of a town). I was an atlas/mapping freak as a kid, and for the strangest reason, I seem to remember poring over Rand McNally maps as a kid and seeing that 49 ended way south of its current terminus at Oakhurst, instead terminating at US-395. If I had to guess/remember, I’d say I remember CA-49 ending near the small town of Independence. This memory is vivid to me because I clearly remember CA-49 being a thin pink line, which was represented on Rand McNally maps as an ordinary (non-major) state highway.
Of course, there are no traversable paths for CA-49 to cross the Sierras and make it all the way over to US-395, and there were no “dotted lines” indicating future CA-49 routing at all, so it must have been a misremembering/mix up of sorts. Still find it oddly interesting.