Margo Hayes is an American professional rock climber from Boulder, Colorado. In 2016, she won both the competition bouldering and the competition lead climbing events at the IFSC Climbing World Youth Championships in Guangzhou (China). In 2017, she became the first woman in history to climb a 9a+ (5.15a) graded route, and in 2019, became the first woman to complete the "9a+ Trilogy".

Robyn Erbesfield-Raboutou, is an American rock climber and rock climbing coach. In competition lead climbing, she is a 4-time World Cup champion, and won the biennial World Championships in 1995. She is the third-ever woman in history to redpoint a 5.14a (8b+) graded sport climbing route. She has coached several competition climbers, including Megan Mascarenas, Margo Hayes and her daughter, Brooke Raboutou.