My wife and myself on the last of our 48 4K+ peaks in NH's White Mountains (custom boots by Peter Limmer the IIIrd), with the highest being Mt. Washington at over 6K. Might sound like peanuts to you Colorado folks, but 1000 to 1200 feet of elevation gain per mile (without switchbacks) is fairly common in the Whites, and the weather is not to be messed with - particularly on Mt. Washington (home of "the worst weather in the world!").
