The Bear 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.
69° on Nov. 15, 1999, the hottest reading for this week of the year since 1890. Next is 66° in 1967.
Bear River’s center stands about 6,530 ft above sea level. Within three miles the land runs from 6,400 ft to 7,040 ft, a difference of 640 ft: hilly country. The highest named summit within 15 miles is Medicine Butte, about 8,600 ft, 7 miles east-southeast.
Under the town center the state geologic map shows Alluvium and Colluvium (clay, silt, sand), from the Pleistocene to Holocene, less than 2.6 million years old.
The section below crosses 9 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 10×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Mudstone, conglomerate. Age: Late Paleocene to Early Eocene, 48 to 59 million years old. About 6 mi of the line.
Mudstone, sandstone. Age: Eocene, 34 to 56 million years old. About 6 mi of the line.
Conglomerate, mixed-clastic. Age: Late Cretaceous to Early Eocene, 48 to 100 million years old. About 3 mi of the line.
Sandstone, siltstone. Age: Eocene, 34 to 56 million years old. About 2 mi of the line.
Sandstone, mudstone, siltstone. Age: Early Cretaceous, 100 to 145 million years old. About 2 mi of the line.
Clay, silt, sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 1 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 3 smaller units 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 Bear River reaches Great Salt Lake by way of the Bear River: about 420 river miles. Great Salt Lake has no outlet to the sea: the water leaves only by evaporating or soaking into the ground.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Bear River; river miles along the main stem, rounded.
Bear River has a warm-summer humid continental climate. Summer afternoons average 81° in July; winter nights fall to about 11° in January. About 12 inches of rain fall in a normal year.
On November 14 Bear River normally reaches 44° and falls to 20°. The record high is 66°, in 1999; the record low −5°, in 1924. The most rain on this date, 0.38 in, fell in 1955.
Normals 1991–2020 and records since 1890 at Evanston 1 E, 10 miles south-southeast, 330 ft higher. NOAA, through RCC-ACIS.