Klaas Koelewijn
Netherlands (NED)
July 1972 (M50)
Personal Records
| 500m | 44,00 | 20 March 2019 | Heerenveen (NED) |
| 1000m | 1.25,80 | 5 November 2023 | Heerenveen (NED) |
| 1500m | 2.09,75 | 20 March 2019 | Heerenveen (NED) |
| 3000m | 4.30,51 | 13 March 2023 | Heerenveen (NED) |
| 5000m | 8.10,28 | 20 December 1998 | Utrecht (NED) |
| 10000m | 19.45,31 | 1 January 2000 | Utrecht (NED) |
Season Bests
| 500m | 44,56 | 5 November 2023 | Heerenveen (NED) |
| 1000m | 1.25,80 | 5 November 2023 | Heerenveen (NED) |
| 1500m | 2.18,39 | 17 December 2023 | Utrecht (NED) |
| 500m | 44,45 | 13 March 2023 | Heerenveen (NED) |
| 1000m | 1.28,11 | 8 January 2023 | Utrecht (NED) |
| 1500m | 2.21,92 | 4 December 2022 | Utrecht (NED) |
| 3000m | 4.30,51 | 13 March 2023 | Heerenveen (NED) |
| 500m | 44,21 | 30 January 2022 | Leeuwarden (NED) |
| 1000m | 1.28,52 | 7 November 2021 | Enschede (NED) |
| 1500m | 2.14,89 | 9 October 2021 | Utrecht (NED) |
| 500m | 44,32 | 15 December 2019 | Heerenveen (NED) |
| 1000m | 1.26,69 | 15 December 2019 | Heerenveen (NED) |
| 1500m | 2.11,73 | 2 March 2020 | Heerenveen (NED) |
| 100m | 12,41 | 11 November 2018 | Utrecht (NED) |
| 300m | 28,80 | 11 November 2018 | Utrecht (NED) |
| 500m | 44,00 | 20 March 2019 | Heerenveen (NED) |
| 1000m | 1.27,88 | 20 October 2018 | Utrecht (NED) |
| 1500m | 2.09,75 | 20 March 2019 | Heerenveen (NED) |
| 100m | 12,52 | 20 February 2018 | Utrecht (NED) |
| 300m | 30,03 | 8 October 2017 | Utrecht (NED) |
| 500m | 44,16 | 24 March 2018 | Heerenveen (NED) |
| 700m | 1.06,32 | 18 March 2018 | Utrecht (NED) |
| 1000m | 1.26,28 | 24 March 2018 | Heerenveen (NED) |
| 1500m | 2.16,30 | 18 November 2017 | Utrecht (NED) |
| 500m | 44,83 | 22 March 2017 | Heerenveen (NED) |
| 700m | 1.05,60 | 19 March 2017 | Utrecht (NED) |
| 1000m | 1.31,37 | 13 November 2016 | Utrecht (NED) |
| 1500m | 2.13,03 | 22 March 2017 | Heerenveen (NED) |
| 3000m | 5.01,36 | 11 February 2017 | Utrecht (NED) |
| 500m | 44,64 | 14 March 2016 | Heerenveen (NED) |
| 1500m | 2.13,02 | 14 March 2016 | Heerenveen (NED) |
| 3000m | 4.54,60 | 9 January 2016 | Utrecht (NED) |
| 500m | 45,50 | 31 January 2015 | Utrecht (NED) |
| 1500m | 2.18,28 | 31 January 2015 | Utrecht (NED) |
| 3000m | 4.55,64 | 31 January 2015 | Utrecht (NED) |
| 500m | 45,95 | 1 February 2014 | Utrecht (NED) |
| 1500m | 2.17,88 | 1 February 2014 | Utrecht (NED) |
| 500m | 45,34 | 22 December 2012 | Utrecht (NED) |
| 1500m | 2.12,66 | 22 December 2012 | Utrecht (NED) |
| 500m | 45,75 | 10 March 2012 | Utrecht (NED) |
| 1500m | 2.16,88 | 10 March 2012 | Utrecht (NED) |
| 3000m | 4.47,89 | 10 March 2012 | Utrecht (NED) |
| 500m | 46,26 | 15 January 2011 | Utrecht (NED) |
| 1500m | 2.19,73 | 15 January 2011 | Utrecht (NED) |
| 500m | 45,47 | 28 February 2009 | Utrecht (NED) |
| 1500m | 2.14,72 | 28 February 2009 | Utrecht (NED) |
| 3000m | 4.42,34 | 28 February 2009 | Utrecht (NED) |
Results
| Clubkampioenschappen AIJV | Utrecht (NED) | 9 March 2024 | ||||||||
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| Zondagavond | Utrecht (NED) | 17 December 2023 | ||||||||
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| Recordwedstrijd Thialf | Heerenveen (NED) | 5 November 2023 | ||||||||
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| Zaterdagavond | Utrecht (NED) | 7 October 2023 | ||||||||
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| Recordwedstrijd Thialf | Heerenveen (NED) | 13 March 2023 | ||||||||
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Native Language Names