The reservoir is located just outside of Cody, Wy on your way to Yellowstone National Park.
In the colder parts of the year, it can be very cold along the water, especially if wind is present and that is most of the time.
This shot was taken on the east shoreline of the reservoir during some high wind. I shot very low to the ground, using a tripod and cable release. I made several shots trying to time the waves to get the best ones.