Map highlighting <b><a href="//commons.wikimedia.org/wiki/Category:California_State_Route_37" title="Category:California State Route 37">California State Route 37</a></b> around <a href="//commons.wikimedia.org/wiki/Category:San_Pablo_Bay" title="Category:San Pablo Bay">San Pablo Bay</a>, in Northern California. 
<ul><li>Unbuilt western section indicated by purple dashes.</li></ul>
<a href="//commons.wikimedia.org/wiki/User:NE2" title="User:NE2">User:NE2</a>
Unknown date<div style="display: none;">Unknown date</div>
<a href="//commons.wikimedia.org/wiki/Special:EmailUser/NE2" title="Special:EmailUser/NE2">Email me</a> if you would like a copy of the GIS data I created for the highways.