They do, only in certain GMU's of course. Go on to the Colorado Department of Wildlife site and I am sure you can find which units have over the counter tags. I usually put in for a cow tag and if I don't draw I just by an over the counter bull tag.
Let me start by telling you the story of two Johns.
John number one went on a day hike with a couple of friends in the Cascade Mountains about an hour from Seattle. He somehow got separated from his buddies and became lost. John was dressed in casual cloths for a warm weather day hike and had nothing but a lunch with him. He spent three days in those mountains and luckily made it out to tell the story.
John number two, a friend of John number one, was much better prepared when...