Technically, the golden chinquapin is not a common street tree, although it has been planted at least once as one in Oregon. Its dislike for 'wet feet' and general sensitivity mean that it's easy to kill. This species is technically Washington's rarest native tree species. While common throughout California and much of Oregon, the golden chinquapin is known from only two occurrences in Washington state. The first is in Mason County along the Hood Canal, and the second is in Skamania County.
If you're in Washington, you can find at least one individual chinquapin near Hood Canal alongside Hwy-101 near Point Ayock (please treat it with respect!). The Skamania population is relatively isolated and much harder to find. While not wild, an easier place to find them thriving is at the Wind River Arboretum, just north of Carson, WA.
One particularly large chinquapin can be found in Woodinville, WA. According to the Burke Herbarium, where I originally found this tree, it's on the site of an old orchard and is one of a few large trees. We could only find one, very large chinquapin there - the largest I've seen.