Your weekend guide to races, and horses, of interest in the mid-Atlantic region.  Three stakes from Parx Racing are on the way, while Laurel and Charles Town prepare for their biggest state-bred days.  Here’s what’s on tap:

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In addition, there is one member of the Mid-Atlantic Thoroughbred/The Racing Biz Top Midlantic-bred Poll in action this weekend.  Valid, ranked seventh on the poll, is the 2-1 second choice in the $90,000 Eight Miles West Stakes at the racetrack formerly known as Calder Race Course, now Gulfstream Park West.