| Athletes |
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Biographical data for: Ralph KOOLOOS
| Classifications in season 2024/2025: |
| Results in season 2024/2025: |
| 500 meter |
| 59 | .80 | 26/01/25 | Alkmaar NED | Regional League NED West 3 - Sebra Sports Cup | Quarter Finals, Group 1 | |
| 1:00 | .16 | 26/01/25 | Alkmaar NED | Regional League NED West 3 - Sebra Sports Cup | Final, Group 1 | |
| 1:00 | .37 | 15/03/25 | Den Haag NED | Regional League NED West Final - Sebra Sports Cup | Semi Final, Group 1 | |
| 1:00 | .52 | 26/01/25 | Alkmaar NED | Regional League NED West 3 - Sebra Sports Cup | Semi Final, Group 1 | |
| 1:00 | .56 | 15/03/25 | Den Haag NED | Regional League NED West Final - Sebra Sports Cup | Quarter Finals, Group 1 | |
| 1:00 | .86 | 16/02/25 | Alkmaar NED | Regional League NED West 5 - Sebra Sports Cup | Quarter Finals, Group 1 | |
| 1:00 | .941 | 29/03/25 | Leiden NED | Arie Ravensbergen Bokaal | Kwart Finales, Groep 1 | |
| 1:01 | .06 | 16/02/25 | Alkmaar NED | Regional League NED West 5 - Sebra Sports Cup | Semi Final, Group 1 | |
| 1:01 | .213 | 09/02/25 | Utrecht NED | Regional League NED West 4 - Sebra Sports Cup | Quarter Finals, Group 1 | |
| 1:02 | .049 | 29/03/25 | Leiden NED | Arie Ravensbergen Bokaal | Halve Finales, Groep 2 | |
| 1:03 | .84 | 14/12/24 | Dordrecht NED | Regional League NED West - Sebra Sports Cup 2 | Semi Final, Group 2 | |
| 1:04 | .36 | 14/12/24 | Dordrecht NED | Regional League NED West - Sebra Sports Cup 2 | Final, Group 3 | |
| 1:10 | .56 | 14/12/24 | Dordrecht NED | Regional League NED West - Sebra Sports Cup 2 | Quarter Finals, Group 1 | |
| 1:11 | .113 | 29/03/25 | Leiden NED | Arie Ravensbergen Bokaal | Finale, Groep 6 | |
| 1:12 | .810 | 09/02/25 | Utrecht NED | Regional League NED West 4 - Sebra Sports Cup | Semi Final, Group 2 | |
| 1:17 | .806 | 09/02/25 | Utrecht NED | Regional League NED West 4 - Sebra Sports Cup | Final, Group 5 | |
| 1:34 | .97 | 15/03/25 | Den Haag NED | Regional League NED West Final - Sebra Sports Cup | Final, Group 1 | |
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| 777 meter |
| 1:37 | .91 | 16/02/25 | Alkmaar NED | Regional League NED West 5 - Sebra Sports Cup | Final, Group 1 | |
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| 2000 meter relay |
| 3:49 | .225 | 29/03/25 | Leiden NED | Arie Ravensbergen Bokaal | Finale, Groep 1 | |
| (IHCL MEISJES 3: Ralph Kooloos, Floris Mingelen, Isolde Ong, Mia Scargo) |
| 4:04 | .75 | 16/02/25 | Alkmaar NED | Regional League NED West 5 - Sebra Sports Cup | Final, Group 1 | |
| (OT1: Tijn Fasseur, Ralph Kooloos, Kylian Van Kranenburg, Frederique van Rhee) |
| 4:13 | .94 | 15/03/25 | Den Haag NED | Regional League NED West Final - Sebra Sports Cup | Final, Group 1 | |
| (TEAM 10: Ralph Kooloos, Fleur van der Knaap, Dex van der Valk, Pieke van Olst) |
| 4:17 | .86 | 26/01/25 | Alkmaar NED | Regional League NED West 3 - Sebra Sports Cup | Final, Group 1 | |
| (S1_T10: Esther Huisman, Beliz Kocak, Ralph Kooloos, Rosanne Widlund) |
| 4:30 | .871 | 09/02/25 | Utrecht NED | Regional League NED West 4 - Sebra Sports Cup | Final, Group 1 | |
| (OT6: Kylian Bodijn, Ralph Kooloos, Ryan Post, Sarah Potters) |
| 5:10 | .10 | 14/12/24 | Dordrecht NED | Regional League NED West - Sebra Sports Cup 2 | Final, Group 1 | |
| (S1T16: Lotte Bijl, Feline Bloemberg, Ralph Kooloos, Dirk Trappenburg) |
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