http://www.youtube.com/watch?v=zWGnM_1ViZA
Sort of...not necessarily "prepared" track other than some tape to mark out where you're supposed to go. Different kinds of terrain, the more the better; hills, gulleys, offcamber turns, mud - in the heat, snow, rain or sleet.
I just got my Bicycling Magazine in the mail yesterday. Bikesnob wrote this article, and I love this description "Obviously, if you're going to try cyclocross, you should first know what it is. Unfortunately, "What is cyclocross?" is one of the most tedious questions in cycling, right alongside "Aren't all pro cyclists on drugs?" and "Why isn't the guy who just won the stage also winning the entire Tour de France?" None of these questions has a simple answer, so when it comes to cyclocross I find it far more effective to explain what it feels like rather than what it actually is--and what it feels like is being dropped from a helicopter into the Florida Everglades with your bicycle on your shoulder. You have 45 minutes to escape before the gators eat you alive, and for some reason, even though you're in the Sunshine State, it's 37 degrees and sleeting."
http://www.bicycling.com/training-nu...s-or-not-cross