Here you can see some of the variability with more deeply lobed margins.
Plants dioecious, males in elongated catkins, females in groups of 3 further back from the males. On this tree the females start to grow but must not be pollinated, and never grow much beyond a small little bur. These are the males, from another tree. The Soquel tree does not produce any males?
Fruit is an acorn and the name Bur oak is from the cap of the acorn. Also called Mosseycup Oak.
This is a young one, again from another tree elsewhere.
Stems stout, sometimes corky. Brown.
Bark is variable, smooth when young, becoming more vertically fissured with age.
White oaks are a tough group without acorns, even with them. With the variability of leaf shapes on this tree, you can see why I was stumped for a long time, I kept waiting for the acorns, which never showed up. There is a seconded tree below the one on Main St. most likely a seedling and it looks more typical for the species.
Hopefully you will have more luck than I.
3240 N. Main St.