If you have good light (at least 3-4 hours of direct sun each day), it will do fine indoors for six months or so. Mint, like most winter-hardy perennials, needs a period of cold winter dormancy, so it will probably die within a year indoors. I think that mint is hardy outdoors in zone 4, if that's an option.

To be honest, I found it a bit invasive, and would probably only grow it in a container. Do you really think it would come back in the spring here?

What kind of mint are you talking about? I think if you mulch and/or get a good snow cover (of late, that has been tricky in CO I understand - thus the long term drought conditions), then they'll probably be fine. Most of the mints are listed as hardy to Zone 3 - 5, although I expect some of the hybrids might be a bit more tender (eg., corsican mint).

I think it is orange mint, but I'm not certain. We don't have snow cover all winter, plenty of freeze and thaw cycles here. From reading that other thread about mint spreading, I'm thinking you can't kill the stuff, LOL!

I've got a very nice lime mint (hello Mojitos!!!) plant growing inside and it's doing very well. It gets plenty of morning sun and the room is flooded with indirect light most of the rest of the day. All the plants I have inside seem to love the room they're in.

I am planning on taking a transplant of Kentucky Colonel mint for inside. Man! Have you people smelled this wonderful herb? So powerful, so sweet!

Last year I moved from one region of Ontario to another and wanted to take some of my plants with me. I had two types of mint, one chocolate mint, the other peppermint. I dug up small clumps of both, put them in pots and since my new house was not built till Oct, I kept both potted mints in my house over the winter. They didn't die, but they didn't thrive either. In the spring, they both went outside and are doing fine. So... mint indoors... it can be done in a pinch. Good luck!