Mule deer are generally easy to identify due to their large mule-like ears (generally 3/4 the length of the head).
They usually have a distinctive black forehead, or mask, that contrasts sharply with a light grey face. The lighter facial coloration makes the eye rings and muzzle markings seem less obvious.
Mule deer are brownish-gray in color, have a white rump patch and a small white tail with a black tip.
From Dubois, WY 2018