| Karl Mayer's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| 2025 Sawatch Ascent | Colorado, US | 34 | Sunday, September 28, 2025 | 05:40:36.00 |
| 2025 Rattlesnake Ramble (Full Course) | CO | 34 | Saturday, September 20, 2025 | 00:32:27.00 |
| 2023 Rattlesnake Ramble (Full Course) | CO | 32 | Saturday, September 16, 2023 | 00:30:40.00 |
| Hardrock 100 2023 | Colorado, US | 32 | Friday, July 14, 2023 | 39:55:57.00 |
| 2017 Golden Gate Dirty 30 (50K) | Colorado, US | 26 | Saturday, June 3, 2017 | 05:30:40.79 |
| The Bear 100 2016 | Colorado, US | 25 | Friday, September 23, 2016 | 21:52:06.00 |