Deschutes Brewery is currently offering a seasonal brew called Twilight Ale. Usually I don't like really hoppy brews, but this stuff is ambrosia. I've also tried their Cinder Cone Red, which is also excellent and also billed as a seasonal ale, but aside from their winter-themed Jubal Ale, this Twilight does the most to actually invoke seasonal sentiments -- you can actually taste the late summer still-light-out-at-late-hours, summer starting to fade into fall when you sip it. Or maybe it's just me.
Either way, it's a delicious beer. To quote Ferris Bueller, I highly recommend it, if you have the means.