Miller began racing
BMX bicycles at age five. She competed at the highest levels in BMX and was part of several professional teams. During most of Miller 's racing years she was a part of HYPER Bicycles Factory BMX team. To
cross train for BMX, Miller began training on
road bicycles at age ten and began to race on the road at age 11. She won her first road cycling national championship title at age 14. As her cycling career progressed, she won numerous national titles and also was selected to compete at the
Junior Road World Championships at ages 17 and 18. In 2008, Miller placed eighth at the Junior Road World Championships in
Cape Town, South Africa. Miller joined the U.S. National Team at age 18. She raced for the team in
Italy,
France,
Poland,
Czech Republic,
Austria,
South Africa,
Netherlands,
Belgium and
Mexico. Miller raced collegiality for
Marian University's cycling team. In 2008–2009, Miller won collegiate track national championships and also collegiate road
criterium national championships. She was the first female cyclist from Marian to win a collegiate road national championship. Because of Miller's performance and final results in the
omnium ranking at the collegiate road nationals in
Fort Collins, Colorado in March 2009, she was named a "Collegiate All-Star" and selected for the all-collegiate-women's team that would compete in the
Nature Valley Grand Prix later that season. She is also a past winner of the
International Tour de Toona. ==Cycling career==