By asasuper 
| Year | Winner(s) |
| 2018 | Keith Essex |
| 2019 | Russ Owens |
| 2020 | Cancelled |
| 2021 | Al & Susan Simmons |
| 2022 | Russ Owens |
| 2023 | Bob Caldwell |
| 2024 | Clemens Ceipek |
| 2025 | Clemens Ceipek |
The Williams Trophy replaced the Stevenson Trophy as the space for inscription was full.
To see a map of the flights made by Clemens in the 2025 event click here.
The trophy is currently awarded at the Parowan Camp to the pilot who scores the best results in four different categories:
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