Your shoes (definitely) and probably everything else you wear is going to get ruined. The run and course itself isn't that bad, most people who showed up for the one I did were drunk/hungover. Just go have fun.
You don't get electrocuted in this one, unless they changed it. That's the tough mudder.
Be prepared to wait in long lines for each obstacle.
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RIP Morgann 2004-2010. Enjoy Doggie Heaven If at first you do succeed, try something harder. When you do things right, people won't be sure you've done anything at all.