I recently had the opportunity to shoot at the 2015 Genesee County Fair. It was an overcast dark misty evening when the rodeo event was taking place. The outdoor arena lighting is not exactly the best but it works for the event. I had no choice but to set my ISO on my Canon 5DMIII much higher than comfortable to stop the action. I started with 3200 then eventually had to go to 25600. I would not want to print any of these but for social media which is what I was shooting for appears fine. All shot using a Canon 70-200 f2.8L IS II USM lens. Did have a great time shooting the event even in the light misty rain.

ISO 3200

ISO 6400

ISO 10000

ISO 25600

Enjoy natures magic.