High Quality Content by WIKIPEDIA articles! Red Rocks Amphitheatre is a rock structure in Red Rocks Park near Morrison, Colorado (west of Denver), where concerts are given in the open-air amphitheatre. There is a large, tilted, disc-shaped rock behind the stage, a huge vertical rock angled outwards from stage right, several large boulders angled outwards from stage left and a seating area for up to 9,450 people in between. The amphitheatre is owned and operated by the City and County of Denver, Colorado.