The section of the Sacramento River where it empties into the northern end of SF Bay is called the Carquinez Straits.
I have paddled in the Straits up to the bridge which marks the border where river meets bay; but, I have only stuck my bow into the SF Bay and then turned around to come back into the Straits. (see my ID photo)
I have also paddled the narrow waterway where the Napa River empties into the northern end of SF Bay; but, I am not sure the name of that section of the Napa River. I just call it Lower Napa River.
