Tough Mudder Training - some advice

Got some advice from a triathlete who ran a tough mudder last year and finished 8th out of about 10,000 participants: "make sure I get some miles in on the trail" ... we also talked about bunch about the different obstacles and what were the tougher parts of the race.  I will be dealing with conditions: potential cold/rain/wind as well as be wet and muddy... hypothermia is potentially going to be a big issue.  Going to try to train in conditions on the trail  the next couple weeks as I near the actual race.