Pueblo West Sportsmans has a 100 200 300 and 425 yd range. I am am member. Dues are 56/66 per year. Guest fee is 3.00 . They may expand in a yr or two to 1000 yrd range.
Royal Gorge Gun Club in Canon City has a 100 to 1300yd rifle ranges. I am not a member. It used to be 35.00 to join. Check their website as it may have gone up. They aslo occasioanlly have life memberships.