When backpacking through a forest or anywhere in the wilderness, where should one keep their food at night?

One of the first things I have learned when camping/backpacking is to never keep any kind of food inside your tent at all. If so, and one is backpacking, say through the Rockies, then where should you put your food when you are not hiking?When backpacking through a forest or anywhere in the wilderness, where should one keep their food at night?
Some place at Rocky Mountain National Park they have "Bear Boxes" and "Bear Cables" or you could get a bear canister.

http://www.basegear.com/bearcache.html
Zach p is on the right track, but is missing a critical reason of why we tie up our food at night. When I have set up camp for the evening and am finished with my food I will tie it up in a tree using about a 30' cord tossed over a high limb. I use my sleeping bag's stuff sack to hold the food.



This practice is typically called "bear bagging" your food, but it also effectively discourages other animals as well that would likely eat through your bag or tent to get to something that smells good. Rabbits, mice, squirrels, and marmots are all Rocky Mountain robbers who need to be denied food access.When backpacking through a forest or anywhere in the wilderness, where should one keep their food at night?
put your food in a bag and then tie it in-between two tree at least 20ft off the ground. make sure the trees are far enough apart so the kamikaze bears don't get it