The city of San Jose is still in the midst of building out their trail network but there's still plenty of miles(57+) to explore right now if you have a chance to visit...
http://www.sanjoseca.gov/DocumentCenter/View/60224
I have been using this aero helmet w/visor ever since a bug got through my sunglasses and almost caused me to crash...
https://www.amazon.com/gp/product/B00MR7LPTY/ref=oh_aui_search_detailpage?ie=UTF8&psc=1