| Michael Hlavacek's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| The Bear 100 2020 | Colorado, US | 48 | Friday, September 25, 2020 | 31:37:49.00 |
| Blue Sky Marathon 2019 (Blue Sky) | Colorado, US | 47 | Saturday, October 19, 2019 | 04:56:27.00 |
| 2018 High Lonesome 100 | 46 | Friday, August 3, 2018 | 32:33:06.00 | |
| 2018 Golden Gate Dirty 30 (50K) | 46 | Saturday, June 2, 2018 | 08:13:10.00 | |
| Quad Rock (2018) (Quad Rock 25) | Colorado, US | 45 | Saturday, May 12, 2018 | 05:33:35.00 |
| Quad Rock 2017 | Colorado, US | 44 | Saturday, May 13, 2017 | 05:56:26.00 |
| 2015 Golden Gate Dirty 30 (50K) | 43 | Saturday, May 30, 2015 | Not yet started |