1974 Map of Alberhill

About this map

Temescal Valley defines the northeastern corridor of this 1974 orthophotoquad, showing the transition from the valley floor to the high elevations of the Santa Ana Mountains. The settlement of Alberhill is visible where the valley narrows, a location long known for its clay deposits and industrial activity. To the west, the landscape rises sharply toward the prominent summit of Trabuco Peak, which stands as a clear geographical anchor for the region. Because this is an orthophoto-based map, it provides an unfiltered visual record of the land use in the mid-1970s, from the geometric patterns of valley development and roads to the intricate, shadowed drainage systems of the mountain slopes. Researchers can observe the density of vegetation and the specific footprint of the built environment before later decades of suburban expansion reached this portion of Riverside County.