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 is a special place - for visitors and archaeologists alike. Our work in the San Pedro brought Preservation Archaeology into focus. It is now central to Archaeology Southwest. The San Pedro Valley is where we first engaged our big-picture research questions about precontact regional migration and population collapse in the southern Southwest. Working with dispersed valley communities prompted us to expand our public programs. Looming threats accentuated the need for active site protection in the valley. Today, our site protection program has a full-time staff, and the number of sites under our protection is growing. Six of these are in the San Pedro.--Amazon.