[3] In 2017, she was Oxfordshire's joint-leading wicket-taker in the County Championship, with 7 wickets including her List A best bowling figures of 5/10, taken against Dorset.
[4][5] She scored her maiden half-century in the 2018 Women's County Championship, as well as ending the season as the fourth-highest wicket-taker across the whole tournament, with 18 wickets at an average of 7.44.
[6][7] In the 2019 Women's County Championship, she was Oxfordshire's second-highest run-scorer and joint-leading wicket-taker, with 135 runs and 9 wickets, as well as making a career-best score of 63* against Wiltshire.
[12][13] On 28 August 2021, Mitchelmore made her debut for the full Southern Vipers side, in a Charlotte Edwards Cup match against South East Stars.
[17] She played six matches for Hampshire in the 2023 Women's Twenty20 Cup, scoring 113 runs and taking one wicket.