The 20-cent Rainbow pick six will have a mandatory payout on Saturday's Santa Anita Derby program, track officials announced.

The bet had a carryover of $431,411 going into Sunday's program. If there are no single ticket winners on Sunday or Friday, track officials predict the total pool will reach $5 million on Saturday when the bet will be distributed regardless of the number of winning tickets.

The Rainbow pick six is structured to be paid fully in the event of a single winning ticket, or to have a payout and a carryover if there is more than one winning ticket.