Island Park Reservoir dominates the southern landscape of this Idaho quadrangle, where the northern waters meet the foothills of the Centennial Mountains. Within the Targhee National Forest, the terrain transitions from the high peaks of the Eastern Centennial Mountains down into the broad expanse of Shotgun Valley. A complex network of drainage systems, including Icehouse Cr, Sheep Cr, and Sheridan Cr, flows through the meadows and timbered slopes toward the reservoir. The map reveals modern access via Kilgore-Yale Rd and Old Kilgore Rd, while also noting the specific scar of the Bishop Burn near Porcupine Canyon. This documentation of the upper Snake River watershed shows the contemporary balance between recreational water resources and managed forest lands.
39 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.
1950 · Upper Red Rock Lake
USGS Topo · 1:62,500
1955 · Ashton
USGS Topo · 1:250,000
1958 · Ashton
USGS Topo · 1:250,000
1960 · Ashton
USGS Topo · 1:250,000
1964 · Island Park Dam
USGS Topo · 1:24,000
1964 · Sawtell PK
USGS Topo · 1:24,000
1964 · Last Chance
USGS Topo · 1:24,000
1964 · Henrys Lake
USGS Topo · 1:62,500
1965 · Icehouse Creek
USGS Topo · 1:24,000
1965 · Crystal Butte
USGS Topo · 1:24,000