Pine Creek Trail

The Pine Creek Trail at Tonto Natural Bridge State Park descends steeply to the base of what is believed to be the largest natural travertine bridge in the world, a geological marvel that spans 183 feet above Pine Creek and stretches 400 feet in length. Despite its short distance, this trail is rated strenuous due to the significant and rocky descent and the challenging return climb back to the trailhead. The path switchbacks down through dense riparian vegetation including Arizona sycamore, Arizona walnut, and canyon grape before reaching the creek level where the full scale of the travertine bridge becomes apparent. Standing beneath the massive arch, visitors can look up through the tunnel to see the sky framed by walls of cream-colored travertine that has been deposited over thousands of years by mineral-rich spring water. Pine Creek flows through the tunnel and into natural swimming pools that are open to visitors during warmer months. The acoustics beneath the bridge are remarkable, with the sound of rushing water echoing off the ancient stone. The travertine formations continue to grow today as mineral-laden springs feed the bridge structure. Mosses, maidenhair ferns, and other moisture-loving plants coat the walls and ceiling of the tunnel. The descent requires careful footing on wet and uneven surfaces, and the return climb will challenge even fit hikers. Trekking poles are strongly recommended for this short but demanding Arizona treasure.