What a great place to enjoy some outdoor hiking/biking/walking! Situated just next to Piestewa Peak, the 32nd and Lincoln trailhead is easily accessible (although popular, so you might have to park across the street), and excellently maintained. The difficulty level depends on which trail you take, and how far you go. It starts of as a gentle slope, but the further you go, the steeper it gets. I have no idea of the distance we travelled, but we hiked for a total of 1.5 hours (ish), and there were a few parts that were pretty strenuous. Excellent workout, beautiful scenery, and 75 degree weather (in January) made for a lovely hike!