| Year | Class 4A/AA | School | Time | Class 3A/A | School | Time | Class 2A/B | School | Time | Class 1A/C | School | Time |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1979 | Kathy Van Heule | Worland | 14.50 | not contested at A level | not contested at B level | Pam Tharp | Manderson | 15.80 | ||||
| 1978 | Kathy Van Heule | Worland | 14.67 | Susan Stone | Jackson | 14.50 | Judy Garner | Guernsey | 15.60 | Pam Tharp | Manderson | 15.75 |
| 1977 | Laura Jean Ferguson | Laramie | 15.20 | Carrie Cronkite | Torrington | 14.87 | Julie Sailer | Burns | 15.25 | Pam Tharp | Manderson | 16.10 |