Aaron Holmes Gwin (born December 24, 1987) is an American professional downhill mountain biker from Morongo Valley, California.

[2] In 2008, at age 20, Gwin was loaned a bike by fellow professional downhill racer and good friend Cody Warren and was encouraged to compete in a race.

The year 2013 was a disappointing one for Gwin, with unexpected poor results culminating in an accident involving a tree at the World Championships.

[2] His BMX racing experience has also contributed to his ability to ride smoothly,[2] bringing him success in Dual Slalom and Mountain Cross.

On January 7, 2013, it was announced that Aaron would be riding for Specialized Racing, replacing Sam Hill on the team.