Here in the PNW, I too noticed fall is here. Yesterday we took G/F's 13 yr old niece out for a very long day (5:30 am to 8:00 pm) "in the wild" (as she worded it). During this day of walking through a large protected wetland/marsh area and hiking in the bordering mountain area that we had to acess by canoe, we seen many signs of fall.
From the marshland grasses turning brown, to flocks of ducks and geese with their extints telling them to head south to warmer climes, to a fat black bear feasting on some plants to tide him over a winters' sleep, to a Blue Heron that actually seemed to enjoy the cooler fall weather and was sunning himself with wings wide open on the water edge.
Most notably though was the sun quickly disappearing under the mountains by 6:00 pm to the west which is behind the direction of this photo. At this point, we still had a 3-1/2 mile hike on fairly easy flat ground in the quickly gathering dusk and by time we reached the car, which was parked way off in the right distance beyond this photo, it was almost complete darkness and the temperature had dropped 9 degrees. Also that mountain in the right background had a skiff of snow on it last week...too early for me!
Although very tired, Niece had a great time and made the comment that she learned more in one day about animals, plants, biology and the outdoors in general then she had ever learned in school...and thats a compliment coming from a straight A student.