This is a medium to large deciduous tree, 30-100 (but generally about 50 around here) feet tall and about half as wide as tall, forming an upright oval shape. Generally multiple trunks. Very fast growing. Fall color can be yellow in areas getting frost. I have found it difficult to find one planted in a residential area, so the picture below shows it in it natural area taken from the foot bridge of Soquel Creek.
(There is also a cultivar called Seattle Sentinel' that is columnar and might be worth having around here.)
Trunks lightly checked, mostly silver gray for many years.
Fall color is a nice yellow. This is up in the rainy PNW.
You might think its a London Plane but the LP has alternate leaves, or you might think its a Silver Maple, Acer saccharium. The silver maple gets its name from the silver undersides of the leaves so look for that, as well as the leaves. The silver maple leaves are smaller, the lobes are more deeply incised and have more minor teeth on them than our native.
Any riparian area. Along Hecker Pass going over to Gilroy.
Highway 1 and 41st ave in the clover leaf by Home Depot and the opposite side.
Along Park Drive nearing the beach, on the railroad side of the street.