rallycross is a timed solo run on a short close course, usually out in a field or on a flat part of an off-road course.
rally is what you see on TV
unfortunately, there's not many rallycrosses in our part of the country yet, but SCCA is putting in a big effort this year to make sure that every part of the country has Rallycross, so keep your eyes peeled on
www.scca.com and
www.myautoevents.com