Snowboarding made its Winter Olympics debut in Nagano 1998 with halfpipe and giant slalom.
Riders competed against the clock before the head-to-head parallel giant slalom version on identical, side-by-side courses was introduced four years later in Salt Lake City.
Three-time Winter Olympian Alex Payer said: “PGS is one of the only formats where everything is truly equal – same course, same conditions, same start, same chance. That fairness is rare in sport.
“If you take it out of the Olympic programme, you take away one of the purest expressions of competition we have.”
Among the sports bidding to replace them in the programme for the Games, which are scheduled for 1-17 February 2030, are freeriding and ice climbing.
Freeriding allows skiers and snowboarders to choose their own off-piste course from top to bottom and also perform tricks as they descend.
They are judged on elements of their descent including the difficulty of the course, jumps and performance.
In ice climbing, competitors climb up a frozen waterfall or glaciers with a speed version favourite for inclusion.
There had been speculation that cyclo-cross would be also be aiming for inclusion but last month IOC president Kirsty Coventry said that “no summer sports and no seasonal crossover events” would be part of the programme.
