| Geoff Grimmer's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| 2021 Silverton Ultra Dirty (100K) | Colorado, US | 45 | Saturday, August 7, 2021 | 20:02:30.00 |
| 2015 Golden Gate Dirty 30 (50K) | 39 | Saturday, May 30, 2015 | 07:09:45.63 |
| Geoff Grimmer's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| 2021 Silverton Ultra Dirty (100K) | Colorado, US | 45 | Saturday, August 7, 2021 | 20:02:30.00 |
| 2015 Golden Gate Dirty 30 (50K) | 39 | Saturday, May 30, 2015 | 07:09:45.63 |