My b. Just read this!
Slipstream does roll racing at Pocono Raceway a few times a year. I’ve never been, but I’ve heard they are cool events.
https://www.slipstreamre.com/
As far as half & full mile standing start racing, I’ve never heard of any in Pennsylvania.
That’s not saying much though, as I often pay so little attention to things once I found my toothbrush in the fridge.