cleardiddion,
There is a disturbing lack of public shooting opportunities along the Front Range.
DOW, ARE YOU LISTENING?????
Unfortunately, you do not have many options. There is the Boulder Rifle club but it is private and the waiting list to join is years long. There is a nice range out past the airport that is accepting members, but it will be an hour drive for you at least. There are a couple of other semi-private and private clubs but they're all either a drive (Pawnee, Owl Canyon) or have waiting lists.
There is one public shooting area up near Allenspark in the hills, if you don't mind shooting elbow to elbow with everyone else.
Living in Loveland, I usually head out Hwy 14 to either the Pawnee Grasslands or Pawnee Sportsmans Center (I am a member there.) But to shoot four an hour means 3 hours of of my day and $20 in gas in my truck.
No matter how you slice it, it just seems to be a minimum 2 hour R/T drive to shoot.
When I lived in California, I had 3 public ranges within 30 minutes of me. In California!!!!
Here in Colorado, no such luck. It's frustrating to me, because I can't even head to the range to work up a load after work. I have to "plan a trip" on a weekend to be able to find the time.
--Duck911