
San Gabriel Mountains dominate this 1933 advance sheet, revealing a landscape of steep canyons and forest management before major mid-century developments. Within the Angeles National Forest, the map identifies early conservation and infrastructure efforts like the Flintham Memorial Forest Plantation and the San Dimas Lookout. The presence of the San Dimas Dam highlights the era's focus on water management and flood control for the growing communities in the valley below. Local landmarks such as Wolfskill Camp and the dramatic Wolfskill Falls suggest a period when these canyons were primarily accessed for recreation and forest service work. High-altitude clearings like Browns Flat and Sycamore Flat provide unique topographical markers amidst the intricate drainage systems of San Dimas Canyon and Evey Canyon.
19 named features on this map. Tap any name to fly to it.
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This is the sole edition of this map. No revisions or reprints were ever made.
1894 · Pomona
USGS Topo · 1:62,500
1897 · Pomona
USGS Topo · 1:62,500
1897 · Cucamonga
USGS Topo · 1:62,500
1898 · Pomona
USGS Topo · 1:62,500
1900 · Cucamonga
USGS Topo · 1:62,500
1901 · Southern California Sheet No. 1
USGS Topo · 1:250,000
1903 · Cucamonga
USGS Topo · 1:62,500
1904 · Pomona
USGS Topo · 1:62,500
1904 · Southern California Sheet No. 1
USGS Topo · 1:250,000
1927 · Glendora
USGS Topo · 1:24,000