Of course it depends on where you are, but I know a number of folks who live in Highland Ranch area who shoot at Ben Lomond Gun Club (blgc.org) down in Ramah, CO. I believe it's east, southeast of Parker. Lots of ranges there and organized quite nicely. Closer than Ft Collins, anyway.
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“If I had to live my life again, I'd make the same mistakes, only sooner.” T Bankhead