Sophia Hurst was born with a spinal condition called spina bifida that meant she has spent her whole life in a wheelchair.
She thought she'd never be able to ski with her little sister, Leila.
However, with the help of America's National Ability Centre, Sophia is now able to rip around the mountain in a sit ski, a special skiing device for wheelchair users.
The video they've made above is truly inspirational. Take a look for yourself...