In 2019, MacLean was seventh at the USA Outdoor Championships 1500m, setting a personal best of 4:05.27. At the 2020 NYRR Wanamaker Mile, she finished sixth, clocking a personal best of 4:25.98 which placed her 15th on the U.S. women's all-time indoor list.[1]
In February 2023 at the New Balance Indoor Grand Prix in Boston, racing in the women’s mile, MacLean edged out Canadian Lucia Stafford to win in a world-leading and personal best time of 4:23.42.[5]
*Distances have varied as follows: Mile (1967–2002), except 1997 and 1999, 2007 and odd numbered years since 2011, 1500 meters 1997, 1999, (2003–6, 2008–2010) and even numbered years since 2010