The Down Royal meeting scheduled for Friday and Saturday of this week has been postponed until 10/11 November after heavy rain.
The Lisburn track has seen 66mm of rainfall since Sunday, and clerk of the course Tracey O'Meara said that there was little prospect of water on the track clearing by this weekend/
"We've been informed the River Lagan will continue to rise over the next 48 hours which will not enable the standing water on the course to subside," O'Meara said.
"We were hoping for a more positive outcome when we started work on the track this morning to remove the water but the situation with the River Lagan leaves us with no option but to make the difficult decision to cancel both Friday and Saturday as the track will simply not be ready in time.
"We were giving the meeting every chance but have made the decision at the earliest possible opportunity with the industry and public in mind.
"We are pleased to say that everyone is in a position to reschedule the fixtures for Friday 10th and Saturday 11th of November and the forecast into next week looks to be more favourable. Fresh entries will close on Monday for Friday and Tuesday for Saturday."
The feature race of the meeting is the Ladbrokes Champion Chase. A strong field was in prospect this week, with Gordon Elliot's Gerri Colombe in contention, and former Gold Cup winner Minella Indo also a possible runner.
Watch the Festival of Racing from Down Royal on Saturday from 1.15pm on RTÉ One and RTÉ Player