Although there are some spectacular views of Mt. St. Helena 6 miles north, this is a very busy road - the main northern connector between the Napa Valley and Santa Rosa/Hwy 101 to the west. This is a good climb throughout and the crux of the climb is .2 miles @14.2% from miles .65 - .85). There is a good shoulder the entire ride, but large commercial trucks, trucks towing trailers and boats and general high vehicle traffic certainly dampens the otherwise excellent views along the climb.
Mt. St. Helena