The objective of 10 GHz and Up is for North American amateurs work as many amateur stations in as many different locations as possible in North America on bands from 10-GHz through Light. Amateurs are encouraged to operate from more than one location during this event. See the detailed rules for restrictions. Begins at 6:00 AM local Saturday though 12:00 midnight local Sunday.

Details at: http://www.arrl.org/10-ghz-up