Tonto Natural Bridge State Park

Unlike the famous stone arches of the Southwest that were carved as wind and water wore holes through sandstone, Tonto Natural Bridge grew the opposite way. Springs in the canyon carry water rich in dissolved minerals, and as that water flows and evaporates, it leaves behind travertine, a form of limestone. Over vast stretches of time, layer upon layer of travertine built up across the canyon until it formed a solid natural dam, and then a bridge, with the creek finding its way through a tunnel beneath.

The process is still going on today. Water continues to drip and flow through the bridge, and the travertine is still slowly forming, which is why the underside of the arch is hung with dripstone, small pools, and mineral curtains that glisten with moisture. Standing in the green tunnel beneath the bridge, with water trickling down all around, you are watching the same slow work that built the entire structure over many thousands of years.

The bridge sits in a deep, shaded canyon that captures water and holds it, creating a cool and startlingly lush environment. Ferns cling to the dripping walls, moss softens the rocks, and cottonwoods, sycamores, and other water-loving trees fill the canyon bottom. The contrast with the surrounding high desert and pine forest is dramatic, and on a hot day the cool air rising from the creek makes the canyon feel like a natural refuge.

All of this lies beneath the Mogollon Rim, the great escarpment that marks the southern edge of the Colorado Plateau and rises in a wall of cliffs across central Arizona. The Rim Country is a land of pine forests, canyons, and creeks, cooler and greener than the deserts below, and Tonto Natural Bridge is one of its hidden treasures. The mix of forest, canyon, and flowing water makes the whole park a welcome green retreat.

This Rim Country has long been part of the homeland of the Apache and other Native peoples of central Arizona, whose descendants remain part of the state today, including the Tonto Apache whose name the bridge and the surrounding country carry. For generations, Native people knew and used this well-watered canyon in a dry land, and the area holds a deep human history that predates any settler by a very long time.

In the late nineteenth century, a Scottish prospector named David Gowan is said to have stumbled upon the canyon while fleeing trouble and to have hidden beneath the bridge, later claiming the land. His family, the Goodfellows, farmed and homesteaded in the beautiful little valley above the bridge and eventually welcomed visitors, and a historic lodge from that era still stands in the park. Their story is part of the pioneer history of the Rim Country, and Arizona later preserved the bridge and valley as a state park.

Spring and fall are ideal at Tonto Natural Bridge, with mild temperatures for the steep canyon trails and, in fall, golden leaves brightening the canyon. Spring brings running water and fresh green growth, filling the canyon with life after the cold of winter.

Summer is popular, when the cool, shaded canyon offers relief from the heat, though afternoon monsoon storms can raise the creek and make the wet rock slick, so caution is needed. Winter is cold at this elevation and can bring snow and ice, closing the steep trails or the road at times, so it pays to check conditions, but a clear winter day can offer the bridge in peaceful solitude.

The closest Boutel™ stays, so you can turn this stop into an overnight. Each is an independently owned, editorially selected place to stay.