From the CYA website:
Due to extremely low water levels in the Great Lakes - St. Lawrence Seaway this year, the 2010 CYA Women's National Keelboat Championships has officially been postponed to the Spring / early Summer of 2011. The hosting organization at the Hudson Yacht Club is disappointed to have had to make this critical decision. We remain fortunate to have gold level sponsors MacDougall, MacDougall and MacTeir Inc. stay onboard for the now 2011 event. Be sure to stay tuned to sailing.ca to see news of the new date for the event.