The Yealmpton show, which was due to be held in Devon on 25th July, has been cancelled.
Organisers say the decision to cancel the 125th show was due to adverse weather conditions.
It's one of a number of horse trials and events in the region that have been cancelled because of this summer's washout weather, including Badminton and Gatcombe.
It appears there is unlikely to be any let up in the relentless rain showers that have battered the Westcountry over the past few days.
Communities in Devon hit by floods over the weekend have been praised by Devon County Council. Many residents are still clearing up.
Dozens of people are clearing up after heavy rain burst rivers and flooded homes. Devon and Dorset hardest hit.