Walking through the Carneros vineyards and Bay Trail
There are actually few places in Napa you can walk, in near silence, surrounded by vineyards. Yes, there are roads you can walk all over Napa Valley just feet from the vines, BUT A ROAD WITHOUT CARS? For this reason, along with the birds, lovely vistas, and gentle breeze, Stanly Lane, is a hidden gem.
Just 100 yards west of the interstion of Highway 29 and Highway 12, is a stoplight directing traffic on the Stanly Lane crossroad. Stanly Lane is now part of the Bay Trail, closed to vehicle traffic just a few years ago. You can park along the vineyard fence to walk or bike a 3 mile stretch of old road it as it runs south into the Carneros appellation. That road, which is visible from the crest of the Butler bridge (as you enter Napa valley from the south) is the old road, dotted with massive eucalyptus trees on both sides.
If you like bird watching there is a resident pair of Great Horned Owls. (Additionally, there are snowy and screech owls, bats, songbirds, and raptors of all kinds.) As the road dead-ends on one section near the Starmont Winery barn, (no tasting room here) you can occasionally catch a glimpse of an Osprey in flight along the Napa River.
Interesting nearby wineries the locals love: Adastra, Truchard, and Artessa. Always call in advance to check their hours.
Nearby places to eat: Stanly Marketplace, Boon Fly Cafe or just over the hill in Sonoma at the Freemont Diner.