| Name: | Geoff Isbister | |
| Gender: | M | |
| Natonality: | AUS | |
| Date | Event | Overall | M | Distance | Time |
|---|---|---|---|---|---|
| 2004 | 2004-03-13 | Six Foot Track (45km trail) | 36 | 36 | 45.000 km | 4:24:41 h |
| 2017 | 2017-05-20 | Ultra-Trail Australia 100 Km (100km trail) | 181 | 154 | 100.000 km | 13:49:16 h |
| 1999 | 1999-03-06 | Six Foot Track (46.6km trail) | 19 | 19 | 46.600 km | 4:22:22 h |
| 1997 | 1997-04-23 | Canberra 50km Ultramarathon (50km road) | 13 | 12 | 50.000 km | 3:58:04 h |
| 1996 | 1996-11-10 | Brindabella Classic (53.8km trail) | 17 | 16 | 53.800 km | 4:45:01 h |
| 2018 | 2018-05-19 | Ultra-Trail Australia 100 Km (100km trail) | 25 | 23 | 100.000 km | 11:25:55 h |
| 2018-07-21 | Elephant Trail Race 50 km (50km trail) | 1 | 1 | 50.000 km | 5:26:43 h |
| 2018-09-08 | The Great North Walk 100 km (100km trail) | 3 | 3 | 100.000 km | 11:53:00 h |
| 2017 | 2017-09-23 | Sri Chinmoy Canberra Centenary Trail Run (104km trail) | 2 | 2 | 104.000 km | 11:45:08 h |
| 2019 | 2019-05-18 | Ultra-Trail Australia 100 Km (100km trail) | 13 | 12 | 100.000 km | 11:15:46 h |
| 2021 | 2021-05-15 | Ultra-Trail Australia 50 km (50km trail) | 65 | 56 | 50.000 km | 5:52:55 h |