Yesterday I looked up and saw this tree had changed color completely without my noticing. I'm sure it's Nyssa sylvatica, or black gum. When I saw the tree I immediately thought of the botanical name as I learned it when I studied horticulture at American River College in Sacramento. My teacher at the time would take us on field trips to see all the trees in their mature state and I remember her saying the tree had brilliant fall color.
The fruit is prized by many North American birds. My photograph doesn't do the color justice since I took the photo in bright sunlight from a distance. The hill behind our house is very steep and I don't go up there.