Dual slalom

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Dan Atherton in Sea Otter
Jimmy Deaton and John Tomac Compete in the Dual Slalom, Mammoth Mountain, 1988
A Dual Slalom race at Sunrise Park Resort in Arizona during the "Sunrise Scramble," a National Collegiate Qualifier organized by the NAU Cycling Club, September 2022

Dual slalom is a mountain bike racing 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 won the 1988 inaugural Dual Slalom.[1] In 1988, Jimmy Deaton and John Tomac were the last male riders to compete, with Tomac emerging as the winner.


  1. ^ "UCI World Championships Mont Saint Anne - Greg Herbold Interview". 2 September 2010.

2012 Sea Otter Classic Dual Slalom video