Hike in Cold Canyon, just west of Winters, California.
Fall is so different here than back East, but I've been here a little more than a decade now, and the changing slant of the sun signals a shift in season to me more than it used to.
And, of course, this time of year, there's far less water than there will be in just a few months. This is the creek bed right now:
And despite the dry, warm, non-Eastern fall, if you look for color, you'll find it. (I don't know what these leaves are, but I love that they look like pumpkins.)