Here's a picture of me taking one of the mud runs I did at the St. Croix County Fair in Wisconsin.  Here I'm on our '05 Outlander 400 XT.  The run was probably about 40-50 yards long and about 3' deep in the center.  The Outty almost pulled a full run, I got stuck on the burm getting out of the puddle after the quickest run of the class.  My cousin who went after me on the same four wheeler ended up getting all the way through (although my time would have been faster )  We also ran our '06 Hawkeye 2×4 in the 2×4 class and got owned by the likes of Banshees and 400EXs.  But we tried!  The event was brand new this year and was a lot of fun.  I encourage anyone in the area to check it out next year.