She attended Heritage High School in Frisco, Texas. A successful junior athlete, in February 2018, she became the fastest girls indoor 400 m runner ever in Texas with a 53.20 effort at the Texas Tech Open. She committed to attend University of Southern California in late 2017.
She finished fourth over 400 metres at the 2025 USA Indoor Track and Field Championships. She was selected for the relay pool at the 2025 World Athletics Indoor Championships in Nanjing in March 2025, where she won the gold medal in the women's 4 × 400 metres relay. On 24 April 2025, she was named in the American team for the 2025 World Athletics Relays in Guangzhou, China in May 2025. She competed for the United States in the women's 4 × 400 metres relay, running the anchor leg as the team won their heat to secure a place at the 2025 World Championships, and won the silver medal on the second day by finishing runner-up to Spain in the final.
On 1 March 2026, she was second to Rosey Effiong in the 400 metres at the 2026 USA Indoor Track and Field Championships, running 51.60 seconds. She was selected to represent the United States at the 2026 World Athletics Indoor Championships in Toruń, Poland. She was a semi-finalist in the individual 400 metres at the championship. She later won the gold medal with the women's 4 × 400 m relay team. She was named in the United States team for the 2026 World Athletics Relays in Gaborone, Botswana. She ran as part of the mixed 4 x 400 metres relay team which won the gold medal having also won their heat on the opening day. Later that month, Lear ran a personal best 50.42 for the 400 metres at the Golden Grand Prix in Tokyo.
Personal life
She received her bachelors's degree in communication from USC in 2021. She received a master's degree in entrepreneurship and innovation in 2022 and another master's degree in digital media management in 2023, both from USC. Lear was named an assistant coach for sprints and hurdles, and operations coordinator, for University of Georgia in October 2023.
References
↑"Bailey Lear". World Athletics. Retrieved 3 March 2024.