Okay, since driving wasn't involved, it was actually wine drinking. Staggering home is not illegal. At least as far as I know.
You won't regret it and you'll taste wines that will make you take a step back (The Wineaux Guy™'s term for a really good wine that stuns you).
I don't know if this is a "trail," per se, but I found it on Wine Country Getaways. The site is, as expected, primarily focused on Sonoma and Napa, as well as other Wine Countries throughout the U.S.
This is one of the most expansive wine trails, but once you're in "the neighborhood," you don't have to go far to get to the next one. In a word, Explore!
The drive from Paso Robles on Hwy 46 West to Hwy 1 is a beautiful one in the Spring, and you just have to visit them. The trip is more than worth it, and depending upon your dedication to speed limits, may only take about 20 minutes.
The difference is whether or not you use the spit bucket. If you're tasting, you use the spit bucket. If you're drinking, you don't.
For example, the Brochelle tasting room, although not on the Union Road Wine Trail, is located next door to Hug Cellars, which is.
Loosely meandering in the San Miguel area northeast of the intersection of Hwy 46 and Hwy 101, they represent some of the most incredibly scenic locations in the area.
As I said in the first post introducing this series, many of the wineries will be on overlapping wine trails.