I used to be a member of the Issac Walton range east of COS on hwy 94, basically south of Aztec motorcross track. I got tired of the jerks at Dragonman's, Dragonman included. I eventually made friends with a guy who had a home range in Falcon.
I moved away from the Springs shortly after the range on Fr Carson was built. My wife didn't have a good experience with the ROs there. She was a part of the Pikes Peak chapter of Well Armed Women. She had an NRA certifed instructor there running the group and was having a training class. The ROs basically harrassed the class treating them all like "little ladies".
There is also a private range, Frontier Gun Club with ranges in Falcon and Hanover. You'll need to apply and be a member of the NRA to join. I was on the waiting list for three years, but by then I was shooting at my buddies. There is a similar range near Canon City, I can't remember the name off the top of my head.