Elizabeth Bird began running in St Albans, and her first club was Hertfordshire Phoenix Athletic Club.[2] She studied at the Princeton University graduating in Public and International Affairs in 2017. She was an NCAA Honorable Mention All-America honoree in the steeplechase in 2015 and was a four-time NCAA Regional qualifier. Bird was a two-time Ivy League champion in the steeplechase and part of the 4x800 m team that won a conference title in 2017 as well as being the Ivy League Cross Country Champion in 2015.[3]
Having qualified for the delayed 2020 Tokyo Olympics in her specialist event, she reached the final after finishing fifth in her heat.[5] In the final Bird broke the national record with a time of 9:19.68, placing ninth.[1]
Bird studied for a master's degree in International Studies at the University of San Francisco between 2017 and 2018 but deferred a place at law school in Boulder, Colorado in order to focus on the 2020 Summer Olympics. She has been involved in advocacy and support for human rights organisation Detention Action.[2]