Royal Ascot.....

My tip is, if you like helicopters, they land with their VIPs at the nearby Golf Course, never know who is going to turn up, might be a chance of an Autograph or two.
 
Not Horse Racing I know but the following could be worth a punt if you can find any bookies offering odds:

McDowell not to make the cut at the US Open

Murray not to make the semi-finals at Wimbledon
 
McDowell 7/4 at Sky Bet to miss cut. He's not playing that well lately and has the added pressure of being the defending champion which may get to him. Worth a punt IMO.