Their fur is gray, brown, or tan. Their underbelly, rear end, and eye patches are light colored. In the summer, they shed the top level of their fur. Their horns are brown color and grow throughout their life. As rams grow old, their horns curl.
Bighorn sheep have a muscular body with a very thick neck.
Their hooves are made for mountain climbing. Bighorn sheep follow narrow trails over mountainsides and steep slopes. Bighorn are also good swimmers. Ewes have one baby in the spring. Baby sheep are called lambs.