Post a link to that marathon!
I agree--such a great time of year to run. Not only is the weather just about perfect, but I'm also typically in decent enough shape to tackle a few adventure runs. Ran up (and down) Mt Timpanogos here in UT yesterday with a friend to celebrate her birthday. I was up there in August, too, but this October day was just as nice. I tried to run up there last in October and got turned back by snow.
My training is a bit unfocused at the moment but that's OK. I'm giving myself a month or so to get it figured out. And in the meantime, I am anxious for it to start snowing so I can get out on the skate skis!