O’Brien takes out grand prix 01/11/2020 FacebookTwitterEmail Deb Henderson Warramboo rider, Regan O'Brien won the SA State Showjumping Monolita Junior Grand Prix. Riding her mare, Billara Woodbine, O'Brien was […] Subscribe or Login to see the rest of the content. Username Password 11 + 4 equals?* Remember Me Forgot Password