1950 Map of Llano Seco

About this map

Rancho Llano Seco sits at the heart of this Sacramento Valley landscape, where the shifting hydrology of the Sacramento River and its intricate network of sloughs and lakes define the local geography. The map captures a moment when river commerce and agriculture were still deeply intertwined, evidenced by river access points at Hites Landing and Parrott Landing. To the east, the Mt Diablo Meridian cuts through a highly managed water system featuring the Odell Canal and Western Canal, supporting the expansive rancho lands like Aguas Frias. The presence of a Grain Elevator and a Gravel Pit indicates a mid-century economy focused on bulk agricultural transport and local infrastructure. This 1950 edition provides an essential view of the river's path around Hartley Island before modern developments further altered these flood-prone reaches.