The Irish rider rode Nadal Hero & DB to the stallion's second 5* win of the week; Canadian Anya Bereznicki dominates U25 division.
After watching cross-country during the day, over 10,000 spectators remained to watch the evening show jumping competition.
A day-one thriller of a class saw the Swiss rider win aboard Chaplin; Sandy Lupton's Count Me In was third for Conor Swail (IRL).
Conor Swail (IRL) soared to victory with Vital Chance De La Roque, and four Canadian entries broke the top 10 to conclude Desert Circuit III.
Conor Swail (IRL) continues his dominance of this league, this time winning aboard Beth Underhill's former ride Count Me In.
Conor Swail continued his winning streak with a win aboard Vital Chance de la Roque to establish a commanding North American league lead.
The Irishman kicked off the North American League with a convincing victory aboard Vital Chance de la Roque, edging Canada's Vanessa Mannix.
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 Harvest Celebration CSI4*-W at Thunderbird Show Park in Langley, BC, is underway and will feature the $150,000 World Cupâ„¢ Vancouver.
The Spruce Meadows North American continued on Saturday with wins for Deslauriers and Conor Swail in the International Ring.