There is/was an unregulated shooting range on BLM land west of Springs but an idiot shot himself so they closed it to all and are supposedly remodelling it to make it safer for sheeple. He can call BLM office in Springs to inquire.
Closest real range I know of is Pueblo West Sportsmens range off exit 110 then west to Platteville. I'm a member, if he'll contact me I'd be glad to take him shooting. It's gated so he has to go with a member. They have pistol, rifle to 425y, and shotgun. There's some remodelling and expansion going on there too so some times some ranges are closed.
It's about a two hour drive (which is fairly modest in many parts of the country; I drive that far for matches in StLouis every month), but the finest range in the country is straight south on I-25; the Whittington Center. The NRA's premier range facility for virtually every discipline the NRA offers. Action Pistol, PPC, Long Range Pistol Silhouette, HP Rifle Silhouette, SB Silhouette, HP-XC, Long Range, you name it, they've got it. Great camping, hunting and lodging, all located on something like 34,000 acres. Best of all, if he's an NRA member, he's already a part owner. Well worth the drive, seriously!