Streaks noted here are since 1932 (boys) and 1976 (girls).

Winning streaks
Boys
Pine Bluffs, 50 in a row, 2015-17
Wyoming Indian, 50 in a row, 1983-85
Thermopolis, 49 in a row, 2003-05
St. Stephens, 46 in a row, 1958-61
Girls
Lander, 46 in a row, 1977-79
Lusk, 43 in a row, 1989-91
Big Horn, 43 in a row, 2009-10
Douglas, 40 in a row, 2020-21

Losing streaks
Boys
Kemmerer, 63 in a row, 1986-89

Girls
Rawlins, 76 in a row, 2007-10