[1] Courtney was introduced to cycling at a young age by her father and they would ride a mountain-bike tandem up Mount Tamalpais together.

In 2012, Courtney became the first American woman to win a UCI Mountain Bike World Cup in the Junior category.

In 2013, Courtney graduated high school and left for Stanford University to study human biology.

Courtney participated at the 2018 UCI Mountain Bike World Championships, winning the gold medal in the women's elite cross country race.

[3] In 2019, Courtney left Specialized for the Scott-SRAM team headed by Swiss mountain bike legend, Thomas Frischknecht .