| Men’s Half Marathon | Time | Year | Venue |
|---|---|---|---|
| Fearghal Curtin | 1.01.44 | 2024 | Houston |
| Jake Smith | 1.04.07 | 2024 | Big Half |
| Dan Nash | 1.05.11 | 2024 | Cardiff |
| Daniel Hamilton | 1.05.49 | 2024 | Cardiff |
| Paul Graham | 1.06.25 | 2023 | Big Half |
| James Heneghan | 1.07.43 | 2022 | Cardiff |
| Adam Bull | 1.07.52 | 2020 | Bath |
| David Long | 1.08.36 | 2023 | Cardiff |
| John Pointon | 1.09.43 | 1990 | Rhymney Valley |
| Samuel Jody Richards | 1.09.59 | 2018 | Cardiff |
| Women’s Half Marathon | Time | Year | Venue |
|---|---|---|---|
| Clara Evans-Graham | 1.10.06 | 2024 | Rome |
| Olivia Tsim | 1.13.38 | 2022 | Copenhagen |
| Chloe Dooley | 1.21.14 | 2022 | Cardiff |
| Kelly Morgan | 1.23.03 | 2012 | Reading |
| Josie Wheeler | 1.23.39 | 2024 | Wokingham |
| Kristie O’Connell-James | 1.26.33 | 2024 | Cardiff |
| Ceri-anne Davies | 1.27.15 | 2007 | Torfean |
| Liz May | 1.29.30 | 2024 | Cardiff |
| Ffion Davies | 1.29.59 | 2016 | Cardiff Half Championship |
| Anne Follan | 1.30.44 | 2002 | Great North Run |