Look for a good season here, with hunter success predicted at around 45 percent or better. According to Tyler Baskfield, information officer for the Colorado Division of Wildlife Resources, the only area of concern is the San Luis Valley, which has had five years of drought. As a result, deer numbers haven't rebounded as they have elsewhere, with lower buck-to-doe ratios. On the other hand, the southwestern units are doing very well, with plenty of precipitation, which is essential for quality ranges. Overall, Colorado supports 570,000 deer. Most mule deer live in the western mountains, though some big bucks dwell in the eastern plains. Whitetails inhabit much of the plains units.