Warners Ranch and Morettis Junction anchor this high-elevation landscape in San Diego County, where the eastern shores of Lake Henshaw meet the sprawling slopes of the Volcan Mountains. The topography is defined by significant valleys including Matagual Valley and Santa Ysabel Valley, separated by prominent local heights like Monkey Hill and Santa Ysabel Peak. This area serves as a critical watershed for the headwaters of Matagual Cr, Carrista Cr, and Santa Ysabel Cr.
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This is the sole edition of this map. No revisions or reprints were ever made.
1903 · Ramona
USGS Topo · 1:125,000
1904 · Southern California Sheet No. 2
USGS Topo · 1:250,000
1939 · Warner Springs
USGS Topo · 1:62,500
1939 · Santa Ysabel
USGS Topo · 1:62,500
1939 · Palomar Mountain
USGS Topo · 1:62,500
1942 · Ramona
USGS Topo · 1:62,500
1943 · Santa Ysabel
USGS Topo · 1:62,500
1943 · Warner Springs
USGS Topo · 1:62,500
1947 · Ramona
USGS Topo · 1:62,500
1947 · Santa Ana
USGS Topo · 1:250,000