Sounds like the Gambler 500. Same $500 ballpark limit but it’s not about speed. Just a fun rally where you go off road from checkpoint to checkpoint in beater rigs, the crazier and dirtier the better. The “gamble” is whether your car makes it 500 miles to the end lol
https://www.jalopnik.com/take-a-shit-in-a-bucket-and-look-at-this-gambler-500-ra-1794806737/