Whether you call it Hayden Butte, Tempe Butte, or "A" Mountain — all valid names, as far as we could tell from our research — this rock pile is sweet for the feet. If you live in Tempe or south Scottsdale, this is the closest you can to an experience that's in the same ballpark as Camelback Mountain or Piestewa Peak, the two most popular Valley mountains for hiking. But beyond the great workout and momentary escape to something akin to nature, hike this one for the scenic view — especially at night. Looking northeast, the bathtub-like Town Lake and vehicle lights on Loop 202 resemble a moving diorama of some futuristic dome-town, like a scene from the 1970s sci-fi movie Logan's Run. Later this year, the antenna and communications equipment at the top will be moved to the soon-to-be-finished West Sixth towers, formerly known as the Centerpoint Towers, which will give the peak a more natural feel. The big "A" will still be there — and still will change color every now and then. This year, not only did University of Arizona students paint the "A" red and blue again, but some folks excited about the death of Osama bin Laden turned the letter a patriotic red, white, and blue.