Camelback Mountain is a short, decently-rigorous hike up a mountain in the middle of the Phoenix area. It's a highlight of the city and without a doubt the most heavily-perfumed trail in America (the ladies of Scottsdale do love their perfume -- even when exercising).
It's a fairly short hike (1.2 to 1.5 miles one way), but rigorous enough for an experienced hiker or trail runner to break a sweat. Two trails lead to the mountain summit (Cholla Trail Vs Echo Canyon Trail)--with Echo Canyon being the shorter and tougher hike of the two.
Each trail provides gorgeous views of Scottsdale and the surrounding area. Absolutely worth a visit.
For more info:
www.destination-scottsdale.com/camelback-mountain.html