Getting to the top is optional. Getting down is mandatory.- Ed Viesturs
My wife is okay walking, she is less excited about hiking. My brother-in-law was mention that his wife is fine hiking or walkin as long as she knows which one it is going to be. We had a back and forth trying to classify and finally came up with our definition. Walking is most comfortable when done in flip-flops while hiking is most comfortablely done in tennis shoes.
Today we when up into the mountains for "hiking" and everyone put on their sneakers. I would like present a third term. It should be called "rock climbing" when you have to use your hands to help you get up. I guess it becomes "spelunking" the moment harnesses a required.