Lemon is classified as a C4 cyclist.[6] In her international debut at the 2017 UCI Para-cycling Track World Championships in Los Angeles, United States, she finished fourth in the Women's C4-C5 Scratch Race.[7]
In September 2017, at the 2017 UCI Para-cycling Road World Championships, Pietermaritzburg, South Africa, Lemon won bronze medals in the Women's Time Trial C4 and Women's Road Race C4.[8] At the 2018 UCI Para-cycling Track World Championships in Rio de Janeiro, Brazil, she won a bronze medal in the Women's Pursuit C4 and was ninth in Women's Scratch Race C4-5 and Women's 500 m Time Trial C4. At the 2018 UCI Para-cycling Road World Championships, Maniago, Italy she won the bronze medal in the Women's Time Trial C4 and finished fourth in the Women's Road Race C4.[9]
At the 2019 UCI Para-cycling Track World Championships in Apeldoorn, Netherlands, she won the silver medal in the Women's Scratch Race C4 and the bronze medal in the Women's Individual Pursuit C4.[10]
At the 2019 UCI Para-cycling Road World Championships in Emmen, Netherlands, she won bronze medals in the Women's Time Trial C4 and Road Race C4.[11]
At the 2020 UCI Para-cycling Track World Championships in Milton, Ontario, she won the silver medal in the Women's Individual Pursuit C4.[12]
At the 2020 Tokyo Paralympics, Lemon won the bronze medal in the Women's Road Time Trial C4 with a time of 41:14.42 and finished fourth in Women's Individual Pursuit C4, ninth together with Amanda Reid and Gordon Allan in the Mixed Team Sprint C1–5 and eighth in Women's Road Race C4-5.[13]
Lemon won the silver medal in the Women's Road Race C4 at 2022 UCI Para-cycling Road World Championships in Baie-Comeau.[14]
At the 2022 UCI Para-cycling Track World Championships in Saint-Quentin-en-Yvelines, France, she won two bronze medals - Women's Pursuit C4 and Women's Scratch Race C4.[15]
At the 2024 Summer Paralympics in Paris, she won silver in the Women's C4 Individual Time Trial.[3] She finished sixth in Women's Individual pursuit C4 and twelfth in the Women's road race C4-5.
At the 2025 UCI Para-cycling Road World Championships in Ronse, she won bronze medals in the Women's Time Trial C4 and Women's Road Race C4.[16]
Lemon has held a South Australian Institute of Sport scholarship athlete.[17]
