Still have no desire to run a road marathon :) But I can come spectate!
Maybe they have a half...or is there a trail marathon ?
There´s only the full distance in Stockholm.
The most popular half Marathon is Göteborgsvarvet
For more trails you could look at:
I've heard great things about the fjallmarathon.
Late August, I don't think either of us will be ready for that this year.