
Lake Umatilla and the Columbia River serve as the central corridor of this landscape, marking the interstate border between Washington and Oregon. The northern side is dominated by the steep rises of Sand Ridge and Alder Ridge, where the settlement of Sixprong sits near the headwaters of Sixprong Creek. In the rugged hills above the river, Golgotha Butte stands near a Radio Tower and Sally Spring, overlooking a series of complex 4WD road networks used for utility access. On the Oregon shore, the terrain shifts into a more industrial and agricultural pattern. Large Settling Ponds and a Feedlot are situated south of the river, while natural features like Threemile Canyon and Sixmile Canyon cut through the benchland. Evidence of local transport and industry is visible in the McCredie area and a riverside Boat Ramp.
23 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.
1906 · Blalock Island
USGS Topo · 1:125,000
1908 · Blalock Island
USGS Topo · 1:125,000
1916 · Arlington
USGS Topo · 1:125,000
1953 · Pendleton
USGS Topo · 1:250,000
1953 · The Dalles
USGS Topo · 1:250,000
1956 · The Dalles
USGS Topo · 1:250,000
1956 · Pendleton
USGS Topo · 1:250,000
1957 · The Dalles
USGS Topo · 1:250,000
1962 · Phinny Hill
USGS Topo · 1:24,000
1962 · Canoe Ridge
USGS Topo · 1:24,000