St. Patrick's Day Parades:
Baltimore St. Patrick's Day Parade
Washington DC St. Patrick's Day Parade
Alexandria St. Patrick's Day Parade
Irish Festivals:
Maryland Irish Festival
Potomac Irish Festival
CCE Irish Folk Festival
Celtic Festival of Southern Maryland
Ceili Dancing:
Emerald Isle Club Monthly Ceili (first Saturdays October-June, in Towson, MD)
CCE Monthly Ceili (second Saturdays September-May, in Fairfax, VA)
Greater Washington Ceili Club
Ring of Kerry Irish Dancers
Ceilidance.com