A the region sailor, Columbia Harding represents in competitive dinghy racing. Since September 2025, 7 races across 1 regattas have been recorded for Columbia. Columbia's primary class has been Dart 18, with additional appearances in other fleets. Key performances include winning the SailingSA events in the multiple fleets fleet, along with the SailingSA events in the multiple fleets fleet. Columbia remains active in regional dinghy racing.