WEDNESDAY afternoon's race meeting at Catterick has been abandoned following three inspections.
A sharp frost overnight saw temperatures reach -4C and fog has prevented conditions from improving.
Clerk of the course Fiona Needham said: "Unfortunately we are shrouded in freezing fog.
"We had a frost overnight but the fog has meant it has continued to freeze.
"It's a real shame but it's beaten us."
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here