| Name: | Bob Williamson | |
| Gender: | M | |
| Natonality: | AUS | |
| Date | Event | Overall | M | Distance | Time |
|---|---|---|---|---|---|
| 1990 | 1990-03-24 | Six Foot Track (46.6km trail) | 106 | 99 | 46.600 km | 5:29:23 h |
| 1991 | 1991-03-03 | Parramatta 50K run (50km track) | 21 | 20 | 50.000 km | 4:58:42 h |
| 1992 | 1992-10-17 | Royal National Park Ultra Marathon - 50mi (50mi trail) | 52 | 47 | 80.467 km | 11:59:39 h |