The 2017 Welsh Grand National has been postponed until January because of poor conditions at Chepstow Racecourse.
The race was scheduled to be run on Wednesday but organisers cited 60mm of rain and snow in the previous 48 hours for forcing the abandonment.
Racecourse bosses say they are in discussion with the British Horseracing Authority with a view to rescheduling the race for Saturday, 6 January.
Native River, trained by Colin Tizzard, won the 2016 Welsh National.
That race went ahead on the scheduled date, but the event has a history of postponements.
In 1994 it was switched to Newbury, while the 1995 and 1996 races were abandoned completely because of frost.
The 2017 delay will be the fourth postponement in eight years.
The 2010, 2012 and 2015 Welsh Nationals took place in the Januaries that followed with frost or waterlogging causing problems.