Ran the Tough Mudder recently. I'd been training for it for a couple months. It was a really good experience. Definitely the hardest thing I've ever done physically.
I've pretty much stopped running since it's been over, and have been concentrating on lifting, trying to put some bulk on. I bought some creatine and have been taking it for about a week. I'll post an update if it works as advertised.
Here's the before and after of the race.