
The San Jacinto River flows through this high-altitude landscape within the San Bernardino National Forest, a region defined by its steep ridges and scattered water sources. In the mid-1990s, the area supported specialized institutions such as the Twin Pines Ranch and Mount Oak Boys Ranch in the northern reaches, while the small settlement of Alandale marks a rare point of residential concentration near the southern boundary. Steep terrain is dominated by summits like Black Mtn and Ranger Peak, with numerous springs like Peach Tree Spring and Oak Spring providing critical water in the arid heights.
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1901 · Southern California Sheet No. 1
USGS Topo · 1:250,000
1901 · San Jacinto
USGS Topo · 1:125,000
1904 · Southern California Sheet No. 1
USGS Topo · 1:250,000
1940 · Palm Springs
USGS Topo · 1:62,500
1940 · Hemet Reservoir
USGS Topo · 1:62,500
1942 · Banning
USGS Topo · 1:62,500
1942 · Hemet Reservoir
USGS Topo · 1:62,500
1942 · Hemet
USGS Topo · 1:62,500
1943 · Hemet
USGS Topo · 1:62,500
1943 · Banning
USGS Topo · 1:62,500