The American rider closed out the WEF Premiere at Wellington International aboard his 'sportscar of a horse' Catoki.
Kent Farrington won the afternoon event with Austria 2, while fellow American McLain Ward and Catoki took the evening feature.
The $75,000 Rosenbaum PLLC Grand Prix saw 32 entries contest a course set by Eric Hasbrouck, with eight advancing to the jump-off.
Week seven at WEF kicked off with a Wednesday win for McLain Ward aboard a horse he says is never ridden between shows, just turned out.
Ballard wraps up a very successful opening week at WEF; Canada's Austin Krawitt 8th in the feature class with the stallion Zazu.
Canada's top performance comes from Erynn Ballard and Ronja, who were 10th in the class of 68 international entries at PBIEC.
McLain Ward wins $100,000 Grand Prix, Canadian Mario Deslauriers and Amsterdam 27 second as the delayed series is given permission to proceed.
McLain Ward (USA) continued to ride his recent wave of success at Deeridge Farms, piloting Catoki to the top of the $36,600 CSI5* Suncast Welcome Stake.
McLain Ward claimed his second win during week three of the 2020 Winter Equestrian Festival aboard Catoki in the $37,000 Bainbridge Companies CSI3.
U.S. Olympic team gold medalist McLain Ward opened week three of the 2020 Winter Equestrian Festival with a win in the $37,000 Douglas Elliman Real Estate.