I live in Monument, Colorado (in between Colorado Springs and Denver) It can be anywhere from the negatives to the forties. Depending on how much snow we got the past year the trails may be covered in snow or very muddy and mushy. My recommendation is to check the weather before coming and make sure it is the way you want it to be. Also, check how much snow we got and if it was a lot expect mud and patches of snow. The best times to go hiking is in late May or early June for Southern Colorado, and late June to early July for hiking in Northern Colorado. If you can only come in February then you will have to face more challenges. One really good place for hiking, especially backpacking is in Silverthorne, Colorado. It is called Eagles Nest Wilderness. It goes very far so you can hike short distances or long ones. If you do get the opportunity to go there then bring something to fish with. When I went up there we hiked to Willow Lake and stayed the night. The other people staying there caught a fish with no bait and no hook. Just a string and a clothespin. So little people go up there that the fish don't get scared very easily and there are a TON of them. Good luck with your trip into CO! ^_^