Good luck! The idea of running 4 hours right now sounds miserable, though most of my long runs have been with someone too fast. Perhaps running 4 at a relaxed pace wouldn't be so bad.

On the fall note - the leaves are turning and starting to fall on the route we did today. It's early for that and supposedly it's because of how dry it's been, but it smelled like fall this morning and that was the happiest thing that came out of this run. It'll still be 90 tomorrow, but if I'm up early enough I can pretend like the seasons are changing!