Colorado Division Of Wildlife has maps on their web site.
http://wildlife.state.co.us/
These maps are great for getting started. You go to the hunting page and go to MORE at the bottom of the list and click. Then scroll down to maps and your in. For hunting here I use BLM maps, they show stuff the best, elevation, Natioal Forest, BLM and roads. Great choice.
Gselkhunter