Kyle King and 'Odie' won the Wednesday opener and Jim Ifko topped the leaderboard on Thursday with 'Monty' over Joey Rycroft's courses.
Kyle King
Top Canadian was Tiffany Foster and Battlecry, who placed second with a clear speedy round in the six-horse jumpoff.
The victory came aboard Etalon, a horse originally intended for the hunter ring; top Canadian in the class was Kara Chad with Quidamo F.
The US rider entered four, but his winning mount with 'a stride like Secretariat' surprised him with the gelding's first grand prix victory.
It was a full slate of hunter and jumper events at Thunderbird Show Park in Langley, BC, culminating with Sunday's $20,000 Grand Prix.
Canadian Ali Ramsay places 4th riding Conrado 12 in the $10,000 Interactive Mortgage 10 & Under Futurity Series.
Vanessa Mannix (CAN) and Catinka 25, who won the $100,000 ATCO Cup last week, finished a very close second.
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.
Three Canadians land in the top 10 of the weekend's feature class at Desert International Horse Park in Thermal, California.
The American edged Canada's Brian Morton for the win at Thunderbird Show Park's Fort Festival, while Emily Ward (GBR) dominated the $5,000 U25.