Native Coloradans consider the 'front range' to be from WY to NM anywhere east of the mtns.
Includes Ft. Collins, Boulder, metro Denver, Colo Spr., Pueblo, Trinidad and a whole lot more. Roughly the eastern 1/3 of the state. Or the part without mountains.

I'm all over hunting small game. I don't intensionally go look for rattlesnakes cause there is no doubt I would find them.