The Santa Rosa Valley, once carpeted in wild oats and littered with acorns from ancient oaks, was home to Pomo and Miwok Indians for thousands of years. The cattle ranches and farms that displaced them in the mid-1800s had already spawned a thriving commercial town named Santa Rosa, the county seat, when the railroad arrived in 1870. That railroad, and the commerce it brought, secured the city's role as the legal and financial nexus of Sonoma County...