"Size doesn't matter ..."
| GUC, Kings Langley AS | Stretch code | All-time max. | 2023 max. | 2022 max. | 2021 max. | 2020 max. | Veggie max. | Retro max. | |
| Hunton Bridge, Bridge Road south to lock 72 | HuBMid | 16.6gBeTo 2017-01-29 | 9.4g | - | - | - | - | 12.9g | - |
| Hunton Bridge, lock 72 south to lock 73 | HuBSou | 13.7gWiNe 2017-01-31 | 5.2g | - | - | - | - | - | - |
| Lock 73 under A41 to Lady Capels lock 74 | LadCaN | 15.5gShEr 2017-03-09 | 2.9g | - | - | - | 7.2g | 15.5g | - |
| Lady Capels lock 74 to Grove Bridge 164 | LadCaS | 15.0gShEr 2023-04-19 | 15.0g | 7.5g | - | - | - | 15.0g | - |
| Grove bridge 164 to Grove Mill Lane 165 | GroMiN | 11.8gWiNe 2016-06-06 | - | - | - | - | - | - | - |
| Grove Mill Lane 165 > Cassiobury top lock 75 | GroMiS | - | - | - | - | - | - | - | - |