Colorado State champions: 1996 1997 1998 2001 2003 2004 2005
Success in water for the Mustangs keeps them in the deep end of the sport. They have won seven state championships (in Class 4A), all over a 10-year span. It's a total that places Mullen second in Colorado annals. It's particularly notable in that the Mustangs don’t have their own pool and can't host a home meet – hence, they are in road meets throughout the season. Mullen practices at Denver’s Athmar Recreation Center. In 2018-19, the Mustangs finished fourth in 4A.