Amateur Susan Griffis Edges Out Pearce for Second Place   Parker, CO – June 11, 2013 - The Kathy and Brad Coors Family Grand Prix Arena was christened on the first week of the Colorado Horse Park’s Summer in the Rockies in a ceremony during the $30,000 Kathy and Brad Coors Family Grand Prix. A field of 12 horse and rider combinations accepted the challenge of Hector Loyola’s technical track, but it was Canadian John Pearce who expertly navigated the jump-off round, besting the rest with long-time partner Chianto, owned by Forest View Farm and Allison Moore .