2012 Map of Boyd Spring

About this map

Surprise Valley defines this section of Modoc County, where the transition between arid rangeland and ephemeral water systems is documented in detail. The settlement of Boyd Spring Ranch sits near its namesake Boyd Spring, representing the long-standing ranching presence in this corner of California. The geography is shaped by intermittent drainages and seasonal water bodies, including Upper Lake and Mud Lake, which are critical landmarks for local land use and resource management. A network of county roads, such as Co RD 15a and Co RD 7, provides access across the flats and toward the various impoundments like Hawk Reservoir and Level Reservoir. This survey provides a baseline of the early 21st-century water infrastructure, tracing the small creeks like First Cr and Second Cr that feed into the valley floor.