I am away mountain biking over the February weekend Hell in The Middle is on otherwise I would do that one too - it is local to me & I often go there mountain biking.
I think I was muddy enough without falling over in the first swamp (which I thought was the Bog of Doom) & then the Bog itself.
I did Hellrunner Up North - Morning Glory for the first time this weekend & loved it! I have done a number of different types of races over the last couple of years & this was my favourite. I hope to be back next year! I am also very grateful to the kind person(s) who saved me from submersing myself in the mud a couple of times.