New Zealand Rodeo Cowboys Association president Lyal Cocks confirmed yesterday the Millers Flat Rodeo Club committee had made the difficult decision to postpone the 2021 rodeo.
A new date was yet to be set.
The Millers Flat Rodeo began in 1964 and traditionally marks the start of the South Island rodeo circuit.
Cocks said the association had decided on Saturday to cancel this year's national circuit and championships.
Many North Island events were also being cancelled and clubs nationwide had had to make "hard decisions" this season.
"Unfortunately, it's not as simple as go or don't go.
"Some costs, such as bringing in specialist rodeo bulls, are shared between several events within a district. So if you only have one of those events left running this year, that needs to be factored into the books."
Cocks said individual clubs could still hold rodeos and offer prizes this season, but no points would be accumulated towards the national championships.
"It is obviously very disappointing, very disheartening, but with so many cancellations we won't have a credible season."
As of earlier this week, southern circuit rodeos left standing included the Lawrence Rodeo (January 29), the Canterbury Rodeo (January 4), the Outram Rodeo (February 6) and the Southland Rodeo (February 27).
Waimate and Maniototo's rodeos (February 26 and 27 respectively) are still scheduled to go ahead.
Joining Millers Flat on the list of postponements are the Mataura Rodeo, Otago's Mad Bull Rodeo, and the Methven Rodeo, all with new dates yet to be set.
Omarama's next rodeo is December 28 next year; Te Anau's will be on December 30 next year.