| Year | Class 4A/AA | Time | Class 3A/A | Time | Class 2A/B | Time | Class 1A/C | Time |
|---|---|---|---|---|---|---|---|---|
| 1979 | Worland | 51.30 | not contested at A level | not contested at B level | Ten Sleep | 55.00 | ||
| 1978 | Cheyenne Central | 51.16 | Newcastle | 52.40 | Guernsey/Pine Bluffs | 52.70 | Burlington | 55.32 |
| 1977 | Laramie | 53.48 | Torrington | 52.42 | Mountain View | 54.37 | LaGrange | 56.80 |
| 1976 | Laramie | 51.80 | Torrington | 51.50 | Lingle | 53.70 | Ten Sleep | 55.30 |
| 1975 | Cheyenne Central | 50.20 | Torrington | 52.49 | Burns | 55.10 | Ten Sleep | 53.70 |
| 1974 | Cheyenne Central | 52.30 | Greybull | 53.70 |