Michael Clarke

The San Pedro Valley is a little off the beaten path, which is one reason why archaeology is generally well preserved there. From Benson north to Winkelman, the valley is served by two-lane roads, and for nearly half of that distance, the roads are unpaved. High mountains to the east and west clearly define the valley, and cottonwoods or dense stands of mesquite reveal places where the river's waters flow above and below ground. This valley truly...