Yes, your subpod will work in a mountain environment. At 8000 feet your compost worms may have some challenges breathing. An aerator will ensure that air is incorporated into the bedding and food mixture. Additionally, it's important to ensure the bedding is not overly wet as this will also decrease available oxygen.
As a Subpod owner, you don’t want your beds to reach freezing point. If you use your beds to recycle organic waste you don’t want the temperatures to be dipping so much that they can’t process food either. Fortunately, there are some tricks to keep your worm beds insulated and warm. Please remember that the composting rate WILL be slower.
It turns out you have a variety of options of increasing sophistication:
Briefly
1. Move the worms out of the Subpod into some buckets to a warmer location indoors in those very cold months
2. Add a cold frame on top of your Subpod
3. Build or purchase a small below ground greenhouse
Luckily we have an American on the Subpod team, who believes that its highly unlikely bears will be attracted to the system, as Subpod is virtually odourless. Subpod also has the option of a lock system so you can padlock it preventing clever animals from lifting open the lid. Subpod's lid is also extremely strong and durable since it has the capacity to hold 440 pounds of weight! In saying all this, as you're well aware, bears are powerful creatures and if they are hungry or curious enough they will break into anything!