Stock car races are supposed to appear after Mr. Philips and while I did get the text from Ron and they did spawn initially, they disappeared before I got the chance to participate in a single race. That was quite some time ago and recently I have finished Minor Turbulence for Trevor so I'm long past that point. Problem is the stock car races have not yet shown up again. Even if I play as Trevor and drive a acceptable racing vehicle the activity does not appear.
Before anyone asks, yes I am a returning player. Is there a specific day I must wait for or do I need to do some sort of work around to fix it?