The Fort Klamath plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.
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Fort Klamath’s center stands about 4,180 ft above sea level. Within three miles the land runs from 4,150 ft to 4,840 ft, a difference of 690 ft: hilly country. The highest named summit within 15 miles is Applegate Peak, about 8,050 ft, 15 miles north-northwest.
Under the town center the state geologic map shows Lacustrine and fluvial sedimentary rocks (clay, silt, sand), from the Pleistocene, less than 2.6 million years old.
The section below crosses 6 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 6×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Basaltic-andesite, basalt. Age: Quaternary, less than 2.6 million years old. About 7 mi of the line.
Clay, silt, sand. Age: Pleistocene, less than 2.6 million years old. About 6 mi of the line.
Dacite, andesite. Age: Holocene, less than 12,000 years old. About 5 mi of the line.
Basaltic-andesite, basalt. Age: Early Pliocene to Pleistocene, 1.2 to 3.9 million years old. About 3 mi of the line.
Basaltic-andesite, andesite. Age: Quaternary, less than 2.6 million years old. About 3 mi of the line.
Basalt. Age: Miocene to Pliocene, 2.6 to 23 million years old. About 0.4 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
A raindrop that lands in Fort Klamath reaches the Pacific Ocean by way of the Wood, the Link and the Klamath: about 300 river miles.
250 miles of the trip are on the Klamath.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Fort Klamath; river miles along the main stem, rounded.
