Ottawa Canada Saint Patricks Day Parade: Saturday, March 10, 2012. Starting @ 11:00 AM and finishing by approximately 1:00 PM Parade begins at Ottawa City Hall (Laurier Ave West @ Elgin St.), proceeds west along Laurier Avenue West, then south on Bank Street to Lansdowne Park, and finishes in the parking area at Lansdowne. Total distance: approximately 3 km (1.7 mi.). A team of judges will select the best entries in the following categories: Best Float, Best Marching Band, Best of All Other. The awards will be presented after the Parade.