The GoPro Grand Prix of Sonoma -- the penultimate race of the Verizon IndyCar Series season -- is hosted by Sonoma Raceway. The 2.385-mile, 12-turn natural-terrain road course is challenging for drivers and spectacularly scenic for spectators.

The event is the 10th under INDYCAR sanction. Our photographers capture the on- and off-track activity of the race weekend, including INDYCAR CEO Mark Miles completing the ALS Ice Bucket Challenge in Victory Circle with an assist from the podium finishers:

Friday, August 22nd - Setup Day
Simon Pagenaud and Josef Newgarden

Saturday, August 23rd - Practice & Qualifications
Sebastien Bourdais

Sunday, August 24th - The GoPro Grand Prix of Sonoma
Ryan Hunter-Reay