I don't think that chart is accurate past the present day. Pimlico has a coronavirus testing center in its parking lot, so I doubt they're running this weekend. The chart has Mountaineer running Sunday the 10th, yet their Twitter says they're restarting on May 31st. Golden Gate is still closed and isn't running on the 9th. Penn National and Parx are listed as running the following weekend and while the trainers there want to run, they aren't reopening until the casinos do.

I think you have to check each track individually and see what they've been posting, or maybe what DRF says.