Tickets for the GoPro Grand Prix of Sonoma on Aug. 28-30 -- the Verizon IndyCar Series' 2015 season finale -- are on sale.

To help ring in the holidays, anyone who purchases race tickets through Dec. 19 will receive a 2014 commemorative Sonoma Raceway ornament (one per account).

The raceway will continue kids' pricing and free admission in 2015. Children 12 and under will be admitted free to the raceway with the purchase of an adult ticket for all three days of the GoPro Grand Prix of Sonoma weekend. Ticket packages, including paddock passes, are available by calling 800-870-7223, visiting an account representative at the raceway or by purchasing tickets online at racesonoma.com/tickets or ticketmaster.com.

Scott Dixon of Target Chip Ganassi Racing won the GoPro Grand Prix of Sonoma -- the penultimate race of the 2014 season -- in August. Will Power, who earned the Verizon P1 Award, went on to clinch the series title the next week.