Hello, my name is Mark Reha, CEO of On The Edge Software Consulting, where I work in technical consulting, education, and professional training. This website presents my historical research on several Central Arizona towns, including Prescott, Chino Valley, Cottonwood, Humboldt, Jerome, Mayer, and nearby ghost towns.

The project traces each community’s development through its general history, business districts, railroads, railyards, and mining activity. The goal is to preserve and share the region’s history through interactive tours, maps, photographs, and research papers for educational and interpretive use.