Bighorn Sheep Winter is so beautiful around Yellowstone: my favorite time of year to visit the park. In winter, bighorn herds move to lower-elevation mountain pastures where it’s easier to capture a nice photo. All the wildlife, like this Bighorn Sheep, stand out against the snow in their full winter coats. Those huge horns can weigh up to 30 pounds even though the sheep may only weigh up to 300 lb.
