1963 Map of Hansen Island

About this map

Surprise Valley and the expansive basin of Middle Alkali Lake dominate this 1960s landscape along the border of California and Nevada. The geography is defined by its arid hydrology, where numerous instances of Flowing Well and Flowing Wells suggest a reliance on subterranean water sources to sustain the area. Hansen Island stands as a distinct landform within the lake bed, connected by a Spring and seasonal drainages. On the western edge, Surprise Valley Road serves as the primary corridor for movement, while the eastern side of the quadrangle is largely undeveloped, marked only by a Trail and Jeep Trail winding through the foothills. Small watercourses like Cottonwood Creek, Owl Creek, and Fortynine Creek descend from the higher elevations, illustrating the drainage patterns that feed the valley floor.