The rivers are running in Colorado right now, but it is going to be a short season with little snow left to melt in the mountains. I was working with my main kayaking ‘model’ yesterday, Patrick, as he looped in a play spot on the Poudre river. The D800 did a great job of catching the action. D800, 1/1000, F5.6, ISO 800.
I have been using a new piece of gear I have to mention because it works so well. If you are shooting a long lens, at 400mm or longer, I highly recommend the Really Right Stuff PG-02 Pano-Gimbal head. I use a 600mm for bird photography, and with my lens attached to this head I can use one finger to effortlessly move my lens around and follow moving subjects.