USA
Sierra is a swimmer from the United States, a distance freestyler and an international traveller on the circuit, whose official competitive record spans 11 seasons, 12 years, 5 countries and 54 meets.
Her recorded career begins in 2012, and one of her earliest marks still on file is the 400 freestyle in 4:07.47, raced in Singapore.
Her signature event is the 400 freestyle, the event she has raced the most, followed by the 800 freestyle and 200 freestyle. Freestyle is the backbone of the whole record: 54 meets and 141 recorded swims.
Her fastest 400 freestyle stands at 4:07.47, set in long course (50 m) at 5th FINA World Junior Swimming Championships 2015.
Her record includes world championships, in 2015 (5th FINA World Junior Swimming Championships 2015). A representative mark at that level is 4:07.47 in the 400 freestyle, recorded in long course (50 m). She also appears in the World Cup circuit, national championships and international meets.
After a 2-year break between 2019 and 2021, she came back to racing and the record picks up again in 2021. 2016 is the busiest season on record, with 28 verified individual swims.
She is a genuinely international swimmer: the official record spans 5 countries (the United States, Canada, Italy, Japan and Singapore), including 4 of 54 meets outside the United States.
Those meets span 32 different venues (Irvine, Indianapolis, Mesa and Omaha…).
Latest competition: 2023 Phillips 66 in Indianapolis, on June 30, 2023, with 1 swim: 4:16.60 in the 400 freestyle, all in long course (50 m). She closes this record with 10 current event personal bests and 46 all-time PB improvements, across 162 verified official swims in competitions governed by World Aquatics and USA Swimming.