This afternoon's race meeting at Market Rasen has been abandoned due to frost.
Officials had called an 8am inspection but they took an earlier look as temperatures dropped well below freezing overnight.
Acting clerk of the course Andrew Morris said: "We have abandoned this afternoon's meeting. "It got down to minus four and it was still minus two at 7.30am. Daytime temperatures are not forecast to be that high and the frost has got into the ground."