Dual slalom is a

mountain bike racing Mountain bike racing (shortened MTB or ATB racing) is the competitive cycle sport discipline of mountain biking held on off-road terrain. The Union Cycliste Internationale (UCI) recognised the discipline relatively late in 1990, when it sanction ...

discipline similar to 4X racing. It consists of two racers racing two almost identical tracks next to each other down a slope. The courses are usually short; one run lasting about 30 seconds. It is filled with tabletop jumps, doubles and bermed turns. Both riders' times are taken and then they switch tracks for another round, whereafter the combined times are counted and slowest rider is eliminated. The winner moves on to the next round until they have 2 riders left racing in the final. The first dual slalom race occurred at Mammoth Mountain, California, in 1987. In the first few heats, the fastest riders were pitted against the slowest, thus eliminating the slowest riders almost immediately.

Greg Herbold Greg "H-Ball" Herbold (Born December 11, 1962) is an American former professional mountain bike racer. He competed in many forms of cycling including cross-country racing and Mountain bike trials but, was most notable for his downhill mountain b ...

won the 1988 inaugural Dual Slalom. In 1988, Jimmy Deaton and

John Tomac John Tomac (born November 3, 1967 in Owosso, Michigan) is an American former professional cyclist who competed from 1985 to 2005. He was a versatile rider who competed in multiple disciplines including; BMX racing, cross-country, road racing, ...

were the last male riders to compete, with Tomac emerging as the winner.

References

2012 Sea Otter Classic Dual Slalom video
{{cycling-stub Mountain biking