Men’s Ultra Records
| Event | Format | Runner | Time | Category | Date | Venue | Competition |
|---|---|---|---|---|---|---|---|
| 100km | Road | Keith Whyte | 07:03:06 | M | 22/06/13 | Torhout, BEL | Night of Flanders 100k |
| 100k | Track | Mick Molloy | 07:26:11 | M | 28/10/78 | London, GBR | Crystal Palace |
| 24hr | Road | Thomas Maguire | 248.392 km | M | 21/11/09 | Monaco, MON | No Finish Line |
| 24hr | Track | Eoin Keith | 244.664 km | M | 19/07/13 | Belfast | Energia 24H |
| 24hr ~ | Indoor | Tony Mangan | 223.133 km | M | 16/03/07 | Brno, CZE | Brno 48H |
| 48hr | Track | Tony Mangan | 401.115 km | M | 11/05/07 | Surgères, FRA | Surgeres |
| 48hr * | Indoor | Tony Mangan | 426.178 km | M | 16/03/07 | Brno, CZE | Brno 48H |
| 48hr ^ | Road | Eoin Keith | 342.969 km | M | 29/12/12 | Phoenix, AZ | Across theYears |
| 50km | Track | Mick Molloy | 02:58:22 | M | 28/10/1978 | London, GBR | Crystal Palace |
*Ratified by IAU as current World Record. ~ The 24-Hour Irish record was a split time in the 48-Hour event. ^ 48 hour split in 72 hour race