There's a new challenge for hikers on South Mountain: the T-Bone Trail, which goes almost straight up to the peak of the Ma-Ha-Tauk Range, climbing in elevation from 1,331 feet in the parking lot to 2,311 feet at its zenith. At the top, the trail, which begins near the landmark T-Bone Steakhouse off South 19th Avenue, loops east across the range, where you can join the Ma-Ha-Tauk Trail and descend back to the parking area. The new trail opened in January after six weeks of bulldozing work. If you're not up to the steep climb, Phoenix Parks and Recreation also has graded an extension of the Ma-Ha-Tauk Trail for a couple of miles west to Laveen. It's a scenic hike among hundreds of saguaros, and also a highly recommended alternative if you're accompanied by a dog; the T-Bone Trail has some sharp drop-offs and there's no room for confrontations between our four-legged friends. One note: Parking at the 19th Avenue Trailhead is limited and prohibited on the street until you are more than a quarter-mile from the entrance. But what the hell, you're there for the exercise anyway, so walk a little farther.