Bachmann’s track is not good for outdoors, but their starter sets aren’t a bad way to start. Sam’s club has a particularly nice one right now, provided you either (a) really like Christmas trains, or (b) don’t mind doing a bit of repainting.
But I digress…
If you’re just starting out, I’d recommend using Aristocraft’s brass sectional track. It’s fairly cheap, comes in a wide variety of curve diameters, and is robust enough to last outdoors for a good long while. Every February, Aristo has a sale where you buy 4 boxes and get a 5th free!
As for power, with 150’ - 200’ of track, traditional track power will work just dandy. In fact, it will work just dandy for 5 times that amount, provided the track joints are solid, and/or you run feeder wires every 30’ or so. You won’t lose power, provided your power supply is up to the task. For that, you’ll want to use any of the mid-to upper range power supplies from MRC, Bridgewerks, Aristocraft (Crest), Blue Streak, etc. GR has a downloadable article that looks at many of the power supplies on the market and compares them. Go to the home page and look for downloads. (I wrote the article a few years back, but get no royalties from its sale.)
Battery power is nice, but not the cheapest way to go if you’re just getting started. Of course, if you want to control multiple locos on the same track, you’re then looking at some kind of DCC system (digital command control), which isn’t inexpensive, either.
My suggestion would be to buy whatever starter set aesthetically appeals to you, use Aristo’s track, and buy a decent power supply. Once you have that, and are playing in the back yard, you can research the merits of DCC, battery, and other methods of running trains. But the important thing is to get the trains running as simply and cheaply as possible first.
BTW, what part of Colorado? If you’re near Centennial, drop me an e-mail.
Later,
K