
The Umatilla National Forest defines this high-elevation landscape in northeastern Oregon, where the headwaters of the North Fork Walla Walla River and its tributaries carve deep through the plateau. Protected lands dominate the area, including the strictly managed Mill Creek Watershed in the north. This region is characterized by prominent ridgelines such as Indian Ridge and Broken Ridge, which stand above the namesake Big Meadows and smaller clearings like Little Meadow Canyon.
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1919 · Walla Walla
USGS Topo · 1:125,000
1921 · Walla Walla
USGS Topo · 1:125,000
1937 · Pomeroy
USGS Topo · 1:96,000
1942 · Pomeroy
USGS Topo · 1:125,000
1953 · Pendleton
USGS Topo · 1:250,000
1953 · Walla Walla
USGS Topo · 1:250,000
1955 · Pullman
USGS Topo · 1:250,000
1955 · Grangeville
USGS Topo · 1:250,000
1956 · Pendleton
USGS Topo · 1:250,000
1958 · Pullman
USGS Topo · 1:250,000