Colorado feels really under-represented on HN for some reason. On Who's Hiring I've only ever seen at most 2-3 Colorado based companies hiring. However, Fort-collins/Boulder/Denver all have a very rich tech culture if you look hard enough for them.
disclaimer: I'm a senior at Colorado State and have no intention of leaving Colorado.
Apparently Portland Oregon lead the way on this - by focusing in the early 90's on new zoning, bicycle pathways and greener parks, they became a nicer place to live, so people who could move (young,professional) choose to move there - and young professional people attract companies who want to hire them (not it turns out so much the other way round)
this seemed to work so well for Portland it also arose in other nice places to live and work - Denver apparently being a winner in that respect internationally too.
I work in Fort Collins as a technical lead; I've never had trouble finding work here. That being said, there are many more opportunities in Boulder, Longmont and Denver. I've turned away lots of opportunities in order to stay in FC; many of my tech friends have moved further south.
Hewlett Packard, Intel, AMD, Avago, National Semiconductor, LSI, and Wolf Robotics all have offices in Fort Collins.
Fort Collins-Loveland was rated 2nd in the "Top 10 Metro Areas for High-Tech Startup Density" in the United States (with Boulder at #1). [0]
We even have an incubator, Rocky Mountain Innosphere [1], if that tickles your fancy.
In short, I don't think you'd have a problem here despite it not being a "tech city".
[0] http://www.kauffman.org/newsroom/young-high-tech-firms-outpa... [1] http://www.rmi2.org/