A few members of my family did a 5K mud run in Soldier Hollow. If you don't know what a mud run is, you have to checkout thedirtydash.com and they have videos of one. It is a race/obstacle course/costume party/nut house. My nephew, who is not a runner, loved it because of all the mud and water and the huge slide at the end.
Here we are before we have entered the course, you can see it in the back ground. The hay bales and walls in the road nearly killed me, I am too short to climb all those! The mud was so deep in some areas that my sister in the dark pink abandoned her shoes and went in just her socks.I am cleaner that my sister at the end because I didn't swim through the last moat of mud, which was pretty deep! It was fun and I would probably do it again, except now I know I would wear Teva sandals, and not my running shoes! It was the longest 5K I have ever run.