Veronica, maillotpois, thanks for your suggestion. I live in Hercules where the edge of Contra Costa.
Many years ago I got hit by a car – the driver found the parking space and suddenly pulled his car to right shoulder, but he didn’t check on his slight back of his right side where I was riding – that horrible memory and 3 scars with 28 stiches are keeping me off from the road that I have to share with cars. But I really want to try triathlon, and would like to learn riding on road. So my biggest concern is safety, good visibility from drivers.
I will check Marsh Creek Road. From Google Map it doesn’t look too far from Hercules. I checked Paul’s web site, wow a lot of information are there! I saw the picture someone riding in Napa in his web photo gallery. Napa looks nice place to ride a bike, too. I will start researching. Thanks again!