Originally Posted by
kb5ql
I can get you to Hesperian, from there you'll need some good alternates:
Dumbarton to the Frontage Road
Left on Thornton --> turns into Paseo Padre
Left on Ardenwood -- turns into Union City Blvd.
All of these streets should have a bike lane/shoulder.
After you get to the intersection of Hesperian/Tripaldi it gets a little dicey.
Good Luck.
No bike lane or shoulder on Union City Blvd from the Alameda Creek overpass to the north side of Union City, as you get near Kaiser.
The Bay Trail would be unpaved for most of the way.
I've been researching this route to ride to Alameda, and there is not a decent way around using Hesperian for quite a ways. Hesperian has no bike lane, so you'd be taking the right lane, as it's too narrow to share.