One of my favorite rides — looking forward to doing this again when my broken wrist is healed. There’s a lot of great parks that line the Bay, and it is fun to see the whole SF Bay area in a day. I often stay closer to the East Bay shore, going through Oyster Bay and Hayward Regional Shorelines. I also tend to think it works better in reverse, since either way you are going into the wind in the afternoon and the winds seem to be lighter on the East Bay side. I recommend bringing a lot of water and food (you’re in the Bay Area, but there are 10-20 mile stretches where there are no drinking fountains or convenience stores) and either a good map or a GPS-enabled phone (perhaps both).
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