This profile likely combines several different runners who share the same name, so its stats may be mixed. It is excluded from the leaderboard.
Duco De Koning
No club · Netherlands
Est. age ≈ 38 (high confidence) · Compare
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60.5%
Runner Score
Local
Local
Age Grade compares a time to the world-best standard for that age, sex and distance, so performances at different distances and ages are directly comparable. 100% is world-record level.
Personal Bests
| Distance | Time | Pace /km | Age Grade | Race | Date |
|---|---|---|---|---|---|
| 10K | 44:45 | 4:29 | 60.5% | Madrid Corre Por Madrid 2023 | |
| Half Marathon | 1:39:26 | 4:43 | 59.3% | XXII Movistar Madrid Medio Maratón 2023 | |
| Marathon | 3:34:59 | 5:06 | 58.8% | Generali Maraton Malaga 2025 |
Full Race History
| Date | Race | Category | Pos | Time | Age Grade |
|---|---|---|---|---|---|
| Generali Maraton Malaga · Marathon | M35 | 2689 | 3:34:59 | 58.8% | |
| Zurich Rock 'n' Roll Running Series Madrid · Half Marathon | M35 | 2875 | 1:41:23 | 60.1% | |
| XXXIX Zurich Maratón de Sevilla · Marathon | M35 | 4636 | 3:36:13 | 57.7% | |
| Madrid Corre Por Madrid · 10K | M35 | 968 | 44:45 | 60.5% | |
| Zurich Rock 'n' Roll Running Series Madrid · Marathon | M35 | 4058 | 4:03:55 | 50.7% | |
| XXII Movistar Madrid Medio Maratón · Half Marathon | M35 | 2981 | 1:39:26 | 59.3% | |
| Madrid Corre Por Madrid: MCXM | Senior M | 1583 | 46:44 | 57.6% | |
| XXI Movistar Madrid Medio Maratón · Half Marathon | Senior M | 2740 | 1:41:14 | 58.0% |
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