Fins and things is one I seem to do every year time I go. Close to town, easy to add on if you have a couple of free hours after something else and also good fun. Metal Masher looks good, but far more of a chunk of time. Looking forward to this!
Exactly, I've used Fins as a warm up before. Then I started using Hells to warm up. Both close to town. Fins much shorter. Can run through in two hours. Hells takes longer, especially if a lot of people are on the trail. The obstacles can get jammed up, and that's what we're there for!