Napa to Glen Ellen

Starting at Silverado Trail Road in North Napa, go North

Travel about 13.5 miles north turn right on the 128 to Lake Hennessey

Ride around Lake Hennessey taking Chilies and Pope Valley Roads to Pope Valley

Go through the town of Pope Valley staying on the main road and going something between half and one mile past the Pope Valley fire station.

Turn left onto a very small uphill road called Ink Grade.

At what appears to be close to the top of the hill turn Right at the cross roads with White Cottage Road

At the cross roads with what appears to be a relatively busy main road, go straight across to Howell Mountain Road

At the split cross roads/intersection with Silverado turn left going south. (Going "across" the cross roads takes you across a bridge to St. Helena

After about 5 miles turn right onto Oakville Cross Road to Oakville

Turn left on US29 go about 200meters and turn right on to Oakville Grade

There are two climbs on Oakville Grade, the first is nightmarishly steep, I was doing 2.5mph standing in first gear. The second is just long. The road changes name from Oakville Grade Road to Dry Creek Road to Trinity Road.

The last five miles are super twisty fast downhill, with a 12% grade to the Intersection of the US12. (I stopped here)

Glen Ellen is, I think, straight across the US12, or you can turn left on the US 12 and get into Glen Ellen that way too.