The Timber Lake 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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Timber Lake’s center stands about 2,170 ft above sea level. Within three miles the land runs from 2,150 ft to 2,230 ft, a difference of 80 ft: gently rolling country. The highest named summit within 15 miles is Saddle Butte, about 2,320 ft, 10 miles northeast.
Under the town center the state geologic map shows Fox Hills Sandstone (sandstone, siltstone), from the Late Cretaceous, 66 to 100 million years old.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 41×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone, siltstone. Age: Late Cretaceous, 66 to 100 million years old. About 24 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 Timber Lake reaches the Gulf of America by way of Whitehorse Creek, the Moreau, the Missouri and the Mississippi: about 2,410 river miles.
Lakes on the way: Lake Oahe, Lake Sharpe, Lake Francis Case and Lewis and Clark Lake.
1,170 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Timber Lake; river miles along the main stem, rounded.
