Discussion: Go for it!

You've got the endurance; just don't push yourself so hard that it isn't fun. You have nothing to prove - and after all, you're leaving town soon. ;)

Treat it like a nice long training run for your next longer race if you aren't ready to race the distance and just have that mindset going in for no disappointment. It's even downhill first half then fairly flat!

It also starts annoyingly late in the day (which seems to be common in Norway). And it's supposed to be a sunny 27° on Saturday afternoon. Tempting to instead just get up and run 21km in pleasant temperatures in the morning rather than losing the whole day just to sweat away a brazilian pounds of water. :-p

Ok, I changed to the 21km event. I'll start hydrating now.

Yay!

Run well!