They've moved it up to this coming Saturday, May 31. The last two years it was usually the end of the first week of June.
http://www.dogdaysdenton.com/
It's a dog friendly fair in Denton, Texas. Vendors, some breed rescues, I think. And it's in the same place as last year, I think. There are a few choke points.
The fair runs from 9 to 4. It's at 321 E. McKinney St., Denton, Texas.