East Bay/Marin - Anyone ridden Twin Sisters/Wild Horse Canyon Rd?

[auto_rock]

Planning to explore some new roads this weekend, and one that I noticed was the Twin Sisters Rd - Wild Horse Canyon Rd possible route, connecting Fairfield to Napa. However, street view doesn't exist in the middle of the route (bad sign), I can't find a Strava segment that goes all the way through (bad sign) and it looks like the "dead end" is at a gun club (probably a bad sign?).

Does anyone know if this route is contiguous?

Thanks

John

[CiclistiCliff]

Pretty sure it's the private shooting range in Fairfield. A friend of mine goes there and he said the road is best accessed by 4wd if driving.

Would advise to find a different route.