I recently visited Colorado Springs and as you can see Pikes Peak is still covered with snow. The rivers looked a little dry for fishing. I would recommend late Spring or Summer when searching for trout. I did spot a few land species...Snow Shoe Rabbits, Pronghorn Antelope and Mule Deer.

Remember when visiting Colorado the air is thinner due to the high altitude and this can make it difficult to breath. You need to drink plenty of water since you are in a dry environment to prevent dehydration.