Officials were due to inspect the course at 7am but gave the go-ahead earlier in the morning.
Clerk of the course, Harriet Graham tweeted: "Racing goes ahead, overnight 2C and no frost."
The ground is good to soft, good in places with a GoingStick reading of 6.5 and temperatures forecast at 4C.
The first of the seven-race card, comes under orders at 12.20pm,
