After qualifying in 15th for the finals, Brockhoff placed 3rd in her quarter final and semi-final to book a spot in the Big Final.
A mistake on a feature near the top of the course in the final, put her behind and was unable to make up any ground on the leaders. Eva Samkova won the event and leapfrogged Brockhoff into the world number one spot.
She did not slip far, holding onto the second place in the world rankings after a tough day of snow conditions.
In the men's competition, Jarryd Hughes topped the list of Aussies, finishing the World Cup in eighth overall after placing second in the Small Final.
Hughes just snuck in to the finals after qualifying in 41st place, but backed up last month's fourth placing with another top-10 placing today.
Dual World Champion Alex Pullin (17th), NSWIS rider Matt Thomas (22nd) and Cam Bolton (23rd) were not able to make it past the second round of head to head racing.
Josh Miller qualified for finals to finish in 43rd, while Adam Dickson was 53rd in the qualification round.
A World Cup Snowboard Cross team event also took place at Solitude, with Jarryd Hughes and Josh Miler representing Australia. The team unfortunately was knocked out in the first round of competition, finishing ranked equal 13th.