| Men’s Half Marathon | Time | Year | Venue |
|---|---|---|---|
| Fearghal Curtin | 1:01:44 | 2024 | Houston |
| Jake Smith | 1:02:20 | 2025 | Bath |
| Dan Nash | 1:04:07 | 2025 | Barcelona |
| Daniel Hamilton | 1:05:49 | 2024 | Cardiff |
| Mike Ward | 1:05:58 | 2025 | Berlin |
| David Long | 1:06:12 | 2024 | Valencia |
| Paul Graham | 1:06:25 | 2023 | Big Half |
| James Heneghan | 1:07:43 | 2022 | Cardiff |
| Adam Bull | 1:07:51 | 2025 | 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 | 1.09.00 | 2024 | Valencia |
| Jenny Nesbitt | 1.11.25 | 2025 | Barcelona |
| Olivia Tsim | 1.13.37 | 2025 | Bath |
| 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 | 1.28.59 | 2024 | Valencia |
| Ffion Davies | 1.29.59 | 2016 | Cardiff Half Championship |