Denver 51st St. Patricks Day Parade: We are looking foward to our 2013 Parade, to be held on 16 March 2013, starting at 10 am. Many argue that the parade has become the single largest gathering of Colorado residents every year in one place, where everyone sets aside their own heritage to become Irish for a day. Many people are under the misconception that the parade is organized and presented by the City of Denver every year. The parade is actually organized and driven by a group of volunteers formed 50 years ago and officially incorporated as the Denver St Patrick’s Day Parade Committee, Inc. in 1986.