The Sprague River 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.
Mostly cloudy
Showers likely
Partly cloudy
Showers likely
Showers likely
Chance of showers
Partly cloudy
Sprague River’s center stands about 4,340 ft above sea level. Within three miles the land runs from 4,290 ft to 5,080 ft, a difference of 790 ft: hilly country. The highest named summit within 15 miles is Swan Lake Point, about 7,250 ft, 9 miles west-southwest.
Under the town center the state geologic map shows Fanglomerate (mixed-clastic), from the Pleistocene to Holocene, less than 2.6 million years old.
The section below crosses 7 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 7×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Age: Pliocene to Pleistocene, less than 5.3 million years old. About 15 mi of the line.
Sandstone, siltstone, mudstone. Age: Miocene to Pliocene, 2.6 to 23 million years old. About 3 mi of the line.
Sand, gravel, silt. Age: Holocene, less than 12,000 years old. About 2 mi of the line.
Mixed-clastic. Age: Pleistocene to Holocene, less than 2.6 million years old. About 2 mi of the line.
Basalt, basaltic-andesite. Age: Miocene to Early Pliocene, 3.6 to 23 million years old. About 1 mi of the line.
Basalt, andesite. Age: Miocene to Pleistocene, less than 23 million years old. About 0.7 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 1 smaller unit along the line are not listed.
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 Sprague River reaches the Pacific Ocean by way of the Sprague, the Williamson, the Link and the Klamath: about 340 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 Sprague River; river miles along the main stem, rounded.
