The Grand Parade viewed by tens of thousands of people along the route from Rock Island, Illinois. A Mass at St. Mary's Church, Rock Island, IL is celebrated at 10:00 am. The parade begins at 11:30 a.m. at the corner of 4th Ave and 23rd St in Rock Island and winds its way west through downtown Rock Island. The Quad Cities Grand Parade features bands, Irish dancers, floats, groups and family clans, and lots of green beer. It's a moving party that has become a tradition in the Quad Cities. Come join us and celebrate!