I have a friend in the Denver area that has a great wife.  She is setting up a class for him to celebrate a milestone birthday.  I live in California, but as someone who familiar with shooting, I have been tapped to help find a suitable range.  The class will be in December.  

The instructor is a well known (and not a particularly polarizing) instructor.  I need to locate a suitable range, and I presume, obtain insurance.  The range or area of the range needs to be closed to non class participants.

I would appreciate any recommendations, or even places to avoid.

I really appreciate any help.

let us know if you have any success

Outdoor in December? In Colorado?

Try indoor silver bullet, blue core, bristlecone, firing line. It'd be easier if you were a member or regular.