CA 77 and it’s tiny half mile freeway lacking a full interchange.
LOL only 1/2 a mile? That's literally just a long stretch of an avenue without a traffic light! Yeah over here we have a road called the "Prospect Expressway" that's only like 1.7 miles long, but half a mile LMAO
Shortest field signed State Highway in California. Grander ambition would have had it much larger in scale than it turned out.
Even at full length it would have qualified as a "weird route", taking a convoluted path through the Oakland hills and ending up at I-680 in Pleasant Hill. Trouble was it went through a
lot of ultra-pricey property in Moraga and Lafayette along the route, so its prospects were pretty dim from the beginning (it was cut back in the '70's to Lafayette) -- and once the urban freeway revolt was in full swing circa the '70's, the entire alignment was pretty much toast.
Nevertheless, if one wants weird-shaped routes, you can't do much better than CA 18: from its southern terminus at CA 210 it goes north for several miles, east for several more, winding through mountains (after all, it's labeled the "Rim of the World" highway) before crossing between two lakes (one mostly dry) and then heading nortwest out of the mountains before striking out west across the desert. And it has one of the few "mutual terminations" in the state: CA 138 terminates at CA 18 near Crestline, while CA 18 terminates at CA 138 out in the desert near the L.A./San Bernardino county line between Phelan and Pearblossom.