The seventh race is coming up at Gulfstream Park, with scheduled post of 3:23 p.m.
It will start the Rainbow 6 with a carryover of $349,994.
Gulfstream is guaranteeing that the jackpot payout will be at least $600,000 if there is just one ticket with all six winners.
The Rainbow 6 jackpot is made up of 80 percent of the day's Rainbow 6 bet and the entire carryover.
Thus if the Rainbow 6 is hit today, the new bets will need to total about $310,000 or Gulfstream will need to put in some of its own money.