Keystone, Keystone Light, and Keystone Ice are all made by Coors. I find Keystone Light is very similar to Coors Light but a lot cheaper. "Always Smooth" is their motto. These beers are very drinkable and very forgettable. They are smooth and light and refreshing on a hot day. But if you want much beer flavor, you will have to go somewhere else. Keystone Light is ubiquitous. I think the Ice is fairly easy to find too. You don't see Keystone regular as much. I used to get it in Massachusetts. I have also seen it in Omaha, Nebraska and Council Bluffs, Iowa.
Where else have you seen Keystone?