Additional Information
A good description is a bike race mixed with steeplechase. In cyclocross, course usually features pavement, dirt, woods, some steep hills and for good measure, some obstacles thrown in that require riders to dismount, work their way through and then get back on and ride some more.
2007: http://www.facebook.com/album.php?aid=74092&id=666039782&l=e166b35d84