Sunday's meeting at Carlisle will go ahead as planned after the course passed a 3pm inspection on Saturday afternoon.
Recent sub-zero temperatures had given officials cause for concern, but a much milder night in Cumbria meant the course was left raceable.
With temperatures not forecast to dip below freezing overnight, the meeting was given the green light.
Carlisle's twitter feed posted: "We have passed the inspection. Carlisle is racing tomorrow. Gates open at 10.30am."
Sunday's meeting at Musselburgh will also go ahead as scheduled after course officials cancelled a planned inspection following a mild night.
The Scottish track was frozen and unraceable on Friday morning, prompting clerk of the course Harriet Graham to announce a 3pm inspection on Saturday afternoon.
But temperatures rose sooner than anticipated and with the frost completely gone, Graham was able to make an early decision.
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