A previous series winner, she reclaimed the title with Havana, a horse she has developed herself since the mare was four years old.
Show Jumping
The Irishman kicked off the North American League with a convincing victory aboard Vital Chance de la Roque, edging Canada's Vanessa Mannix.
The pair lead wire-to-wire in the $15,000 CSI4*-W 1.45m at Thunderbird Show Park's Harvest Celebration over Justin Prather and EZ Ace.
The prolific winner places one-two in Friday's $75,000 CSI4*-W during the Harvest Celebration; his student Vanessa Mannix (CAN) claims 3rd.
The Canadian couldn't quite catch winner Cassio Rivetti but also placed 8th in the class at the International Jumping Festival in California.
The Harvest Celebration CSI4*-W at Thunderbird Show Park in Langley, BC, is underway and will feature the $150,000 World Cup™ Vancouver.
Rocky Mountain Show Jumping has increased the purse from $125,000 to $150,000, with a further $25,000 in rider bonuses.
Hayes qualified two horses for the jump-off at Wesley Clover Parks over a track set by Canadian course designer Pierre Burch.
Deslauriers, Asselin, and Coyle take the big classes in the International Ring to close out the September Series.
The German won the Rolex Grand Prix of Aachen on home ground, narrowly edging 20-year-old US rider Brian Moggre.