Walker and Coralissa jumped to the top of the leaderboard against 62 other talented young riders on the Derby Field at WEF.
Less than a second separated the winner from runner-up Beezie Madden (USA) and her veteran partner Breitling LS.
Following 30 years of competition organization, EMG will turn over operations of the Caledon Equestrian Park to Angelstone Events.
Ashlee Bond (ISR) and Imagine out-galloped Canada's Erynn Ballard and Classic Penny to top a field of 40 over Catsy Cruz's (MEX) course.
Both Youth Championships will be hosted in Germany, with the Youth Jumping in Aachen and the U25 Dressage in Hagen.
Canadians Eric Lamaze and Tiffany Foster place 5-6 in the class, while Rachel Cornacchia grabs 2nd place in $50,000 grand prix.
Week four of the Desert Circuit at DIHP wrapped up with a win for King; top Canadian was Brian Morton, who was 7th riding Crusador Z.
Two Canadians were top-10: Mario Deslauriers and Bardolina (7th) and Eric Lamaze with Dieu Merci Van T & L (10th).
The pair win the $37,000 Restylane 1.45m CSI2* ‒ a hot start, as it is their first show after a lengthy break due to the pandemic.
Organizers hope to make an official announcement of the venue's plans for the 2021 season no later than March 15th.