| Event | 2015 SSE Airtricity Dublin - Marathon |
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| Name | Thomas Simmons | Club | North Belfast Harriers | Race Number | 5336 | Date | 26/10/2015 |
| Gender | Male | Gender Position | 63 of 8910 | Category | M35 | Category Position | 13 of 1915 |
| 10K | 00:37:11 | Stage Position | 62 |
| Halfway | 01:18:38 | Stage Position | 59 |
| 30K | 01:53:03 | Stage Position | 57 |
| Gun Time | 02:44:27 | Overall Position | 71 |
| Chip Time | 02:44:17 | Chip Position | 67 |