Bathtub Trail

The Bathtub Trail at Tonto Natural Bridge State Park leads to a series of natural travertine pools beneath the enormous natural bridge, where Pine Creek has carved smooth, rounded basins into the mineral-rich stone that invite wading and swimming during the warmer months. These natural pools, shaped by centuries of flowing water, sit directly beneath the massive arch of the world's largest known natural travertine bridge, creating a swimming experience unlike any other in Arizona. The trail descends steeply to creek level, where the otherworldly landscape of cream-colored travertine, rushing water, and overhanging stone creates a scene of extraordinary natural beauty. The smooth, curved walls of the pools demonstrate the power of moving water to shape even hard mineral deposits over geological time. Ferns, mosses, and wildflowers find purchase in the cracks and crevices of the travertine, adding splashes of green and color to the pale stone. The combination of cool water, natural shade from the bridge overhead, and the stunning geological setting makes the bathtub pools a favorite destination for families and photographers. Trail conditions can be demanding with wet, slippery rock surfaces requiring careful movement. Water shoes or sandals with good grip are recommended for those planning to wade or swim. The Bathtub Trail offers one of the most unique and memorable natural swimming experiences available anywhere in the Arizona state park system.