Meghan was raised in Rumson, New Jersey and nearby Little Silver. Meghan began snowboarding at age ten. Her family moved to Edwards, Colorado to allow Meghan and her siblings, Chris, Daniel and Makayla, to further their snowboarding training. Meghan attended the Vail Ski & Snowboard Academy for her first two years of high school before transferring to the International Snowboard Training Center.
In November 2016, Tierney fell during a training camp in Austria, breaking the L3 vertebrae in her back. The injury forced Tierney to sit out the rest of the 2016-17 season. Tierny placed 25th and 31st in her first World Cup races of the 2017-18 season. Tierney finished the final World Cup race before Olympic selection in seventh, the top placing American woman at the event. She has been selected to compete in snowboardcross for the United States at the 2018 Winter Olympics in Pyeongchang.
- "Meghan Tierney". U.S. Ski & Snowboard. Retrieved January 28, 2018.
- Edelson, Stephen. "Winter Olympics: Monmouth County native Meghan Tierney headed to South Korea", Asbury Park Press, January 25, 2018. Accessed January 28, 2018. "Meghan Tierney was the young American girl competing in the rough-and-tumble world of international snowboard cross, challenging the top female snowboarders on the planet on icy turns and big-air jumps at harrowing speeds down the most treacherous courses.... Now Tierney, who grew up in Rumson and Little Silver, joins teammates like silver medalist Lindsey Jacobellis, her idol and former instructor, who was teaching her jumps at an early age, on the biggest stage in winter sports."
- LaConte, John (January 25, 2018). "Eagle's Meghan Tierney makes Olympics". vaildaily.com. Retrieved January 28, 2018.
- "Meghan Tierney". Team USA. Retrieved January 28, 2018.