I originally gave this shoe a bad review, but I have run the Tahoe tough mudder (11 miles) and Spartan beast (14+ miles) in these shoes, and they have held up fantastic.  The tread on these are great and they are light weight, which is key. The mud cleans off easy and they are ready to go again. I originally gave them two stars but now I'm bumping them up to four stars.  Would be 5 stars but I still feel they are a little narrow. If you have a skinney foot they are probably ideal,.. but I have a Fred Flintstone feet.