Just a fun thought experiment. You pick one highway for a golf road trip. I could be an interstate, route, or a motorway if you prefer tea. You can deviate a bit, but not significantly... e.g. I-80, I-70 can all go to Ballyneal, but only I-80 can go to Sand Hills (not I-90). To make it reasonably fair on length, let's say you max out on 14 courses (a two week road trip), and only one course per metro.
To start, I'll pitch the humble California State Route 1:
Choice in Orange County and LA, Jerry Perenchio's 3-hole, Rustic Canyon, Soule Park, Montecito, Morro Bay, choice in Monterey, Pasatiempo, choice in SF, Meadow Club, Northwood, Sea Ranch.