It came down to a two-horse race between Hannah Rajotte/ Patronus and Ashley Arnoldt/Lestat OLD over Peter Holmes' course at tbird.
Thunderbird Show Park
A contentious eight-horse jump-off saw Vanessa Mannix (CAN) and Catinka 25 settle for second with Conor Swail (IRL) and Theo 160 third.
The newlywed won the $15,000 CSI3* Maui Jim Winning Round 1.45m aboard her longtime mount, Goodwill VB.
Vanessa Mannix (CAN) and Catinka 25, who won the $100,000 ATCO Cup last week, finished a very close second.
Competition continues at the Summer Fort Classic CSI3* with Irish rider Robert Blanchette placing one-two in the $25,000 Hunter Derby.
As the border gradually reopens to non-citizens, it sees the welcome return of international competition to Thunderbird Show Park.
Thunderbird Show Park in Langley, BC wrapped up five days of show jumping at the West Coast Classic with the $20,000 Maui Jim Grand Prix.
Due to an extension of the current pandemic restrictions, the venue is unable to host the Canadian Premier and Odlum Brown BC Open.
It was a popular hometown grand prix win for Brian Morton on Sunday afternoon at Thunderbird Show Park during the Harvest Welcome.
"I didn’t know she could go that fast" - young rider finds a new gear to defeat a competitive jump-off field of five to claim top honours.