This afternoon's jumps meeting at Leicester must now pass an 11.30am course inspection.
Temperatures dipped to minus 7C overnight in the East Midlands, but clerk of the course Jimmy Stevenson is still refusing to admit defeat following two checks this morning.
He said: "It's coming on nicely, we just need another hour.
"We've got a problem on the road crossings - the frost got under the covers - but we are hopeful. We've walked the track and we can't find anything that is really worrying us."
The six-race card is due to get under way at 12.50pm.
Today's fixture at Carlisle was abandoned due to a frozen track following an inspection at lunchtime yesterday.