The mcgrath amphitheatre, nestled along the cedar river, is where melodies meet the water’s edge. It’s the stage for an array of events that. Weblocated on the west bank of the cedar river in downtown cedar rapids, the mcgrath amphitheatre is the premier amphitheatre in iowa. Opened in 2014, the amphithetre. Webcedar rapids offers a mix of history, culture, and outdoor fun. From the czech village to the african american museum, there's something for everyone. Webbut what is it about mcgrath amp that makes it so special to visitors, guests, and music lovers from all over the world. Is it the naturalized outdoor setting located on the west.